Illinois 2025-2026 Regular Session

Illinois Senate Bill SB1365 Latest Draft

Bill / Introduced Version Filed 01/29/2025

                            104TH GENERAL ASSEMBLY
 State of Illinois
 2025 and 2026 SB1365 Introduced 1/28/2025, by Sen. Sally J. Turner SYNOPSIS AS INTRODUCED: 55 ILCS 5/5-12020 Amends the Counties Code. Provides that the owner of a commercial wind energy facility or commercial solar energy facility must compensate landowners if the facility adversely affects the flow of water within the landowner's land, including, but not limited to, by affecting a drainage tile. LRB104 10489 RTM 20564 b   A BILL FOR 104TH GENERAL ASSEMBLY
 State of Illinois
 2025 and 2026 SB1365 Introduced 1/28/2025, by Sen. Sally J. Turner SYNOPSIS AS INTRODUCED:  55 ILCS 5/5-12020 55 ILCS 5/5-12020  Amends the Counties Code. Provides that the owner of a commercial wind energy facility or commercial solar energy facility must compensate landowners if the facility adversely affects the flow of water within the landowner's land, including, but not limited to, by affecting a drainage tile.  LRB104 10489 RTM 20564 b     LRB104 10489 RTM 20564 b   A BILL FOR
104TH GENERAL ASSEMBLY
 State of Illinois
 2025 and 2026 SB1365 Introduced 1/28/2025, by Sen. Sally J. Turner SYNOPSIS AS INTRODUCED:
55 ILCS 5/5-12020 55 ILCS 5/5-12020
55 ILCS 5/5-12020
Amends the Counties Code. Provides that the owner of a commercial wind energy facility or commercial solar energy facility must compensate landowners if the facility adversely affects the flow of water within the landowner's land, including, but not limited to, by affecting a drainage tile.
LRB104 10489 RTM 20564 b     LRB104 10489 RTM 20564 b
    LRB104 10489 RTM 20564 b
A BILL FOR
SB1365LRB104 10489 RTM 20564 b   SB1365  LRB104 10489 RTM 20564 b
  SB1365  LRB104 10489 RTM 20564 b
1  AN ACT concerning local government.
2  Be it enacted by the People of the State of Illinois,
3  represented in the General Assembly:
4  Section 5. The Counties Code is amended by changing
5  Section 5-12020 as follows:
6  (55 ILCS 5/5-12020)
7  Sec. 5-12020. Commercial wind energy facilities and
8  commercial solar energy facilities.
9  (a) As used in this Section:
10  "Commercial solar energy facility" means a "commercial
11  solar energy system" as defined in Section 10-720 of the
12  Property Tax Code. "Commercial solar energy facility" does not
13  mean a utility-scale solar energy facility being constructed
14  at a site that was eligible to participate in a procurement
15  event conducted by the Illinois Power Agency pursuant to
16  subsection (c-5) of Section 1-75 of the Illinois Power Agency
17  Act.
18  "Commercial wind energy facility" means a wind energy
19  conversion facility of equal or greater than 500 kilowatts in
20  total nameplate generating capacity. "Commercial wind energy
21  facility" includes a wind energy conversion facility seeking
22  an extension of a permit to construct granted by a county or
23  municipality before January 27, 2023 (the effective date of

 

104TH GENERAL ASSEMBLY
 State of Illinois
 2025 and 2026 SB1365 Introduced 1/28/2025, by Sen. Sally J. Turner SYNOPSIS AS INTRODUCED:
55 ILCS 5/5-12020 55 ILCS 5/5-12020
55 ILCS 5/5-12020
Amends the Counties Code. Provides that the owner of a commercial wind energy facility or commercial solar energy facility must compensate landowners if the facility adversely affects the flow of water within the landowner's land, including, but not limited to, by affecting a drainage tile.
LRB104 10489 RTM 20564 b     LRB104 10489 RTM 20564 b
    LRB104 10489 RTM 20564 b
A BILL FOR

 

 

55 ILCS 5/5-12020



    LRB104 10489 RTM 20564 b

 

 



 

  SB1365  LRB104 10489 RTM 20564 b


SB1365- 2 -LRB104 10489 RTM 20564 b   SB1365 - 2 - LRB104 10489 RTM 20564 b
  SB1365 - 2 - LRB104 10489 RTM 20564 b
1  Public Act 102-1123).
2  "Facility owner" means (i) a person with a direct
3  ownership interest in a commercial wind energy facility or a
4  commercial solar energy facility, or both, regardless of
5  whether the person is involved in acquiring the necessary
6  rights, permits, and approvals or otherwise planning for the
7  construction and operation of the facility, and (ii) at the
8  time the facility is being developed, a person who is acting as
9  a developer of the facility by acquiring the necessary rights,
10  permits, and approvals or by planning for the construction and
11  operation of the facility, regardless of whether the person
12  will own or operate the facility.
13  "Nonparticipating property" means real property that is
14  not a participating property.
15  "Nonparticipating residence" means a residence that is
16  located on nonparticipating property and that is existing and
17  occupied on the date that an application for a permit to
18  develop the commercial wind energy facility or the commercial
19  solar energy facility is filed with the county.
20  "Occupied community building" means any one or more of the
21  following buildings that is existing and occupied on the date
22  that the application for a permit to develop the commercial
23  wind energy facility or the commercial solar energy facility
24  is filed with the county: a school, place of worship, day care
25  facility, public library, or community center.
26  "Participating property" means real property that is the

 

 

  SB1365 - 2 - LRB104 10489 RTM 20564 b


SB1365- 3 -LRB104 10489 RTM 20564 b   SB1365 - 3 - LRB104 10489 RTM 20564 b
  SB1365 - 3 - LRB104 10489 RTM 20564 b
1  subject of a written agreement between a facility owner and
2  the owner of the real property that provides the facility
3  owner an easement, option, lease, or license to use the real
4  property for the purpose of constructing a commercial wind
5  energy facility, a commercial solar energy facility, or
6  supporting facilities. "Participating property" also includes
7  real property that is owned by a facility owner for the purpose
8  of constructing a commercial wind energy facility, a
9  commercial solar energy facility, or supporting facilities.
10  "Participating residence" means a residence that is
11  located on participating property and that is existing and
12  occupied on the date that an application for a permit to
13  develop the commercial wind energy facility or the commercial
14  solar energy facility is filed with the county.
15  "Protected lands" means real property that is:
16  (1) subject to a permanent conservation right
17  consistent with the Real Property Conservation Rights Act;
18  or
19  (2) registered or designated as a nature preserve,
20  buffer, or land and water reserve under the Illinois
21  Natural Areas Preservation Act.
22  "Supporting facilities" means the transmission lines,
23  substations, access roads, meteorological towers, storage
24  containers, and equipment associated with the generation and
25  storage of electricity by the commercial wind energy facility
26  or commercial solar energy facility.

 

 

  SB1365 - 3 - LRB104 10489 RTM 20564 b


SB1365- 4 -LRB104 10489 RTM 20564 b   SB1365 - 4 - LRB104 10489 RTM 20564 b
  SB1365 - 4 - LRB104 10489 RTM 20564 b
1  "Wind tower" includes the wind turbine tower, nacelle, and
2  blades.
3  (b) Notwithstanding any other provision of law or whether
4  the county has formed a zoning commission and adopted formal
5  zoning under Section 5-12007, a county may establish standards
6  for commercial wind energy facilities, commercial solar energy
7  facilities, or both. The standards may include all of the
8  requirements specified in this Section but may not include
9  requirements for commercial wind energy facilities or
10  commercial solar energy facilities that are more restrictive
11  than specified in this Section. A county may also regulate the
12  siting of commercial wind energy facilities with standards
13  that are not more restrictive than the requirements specified
14  in this Section in unincorporated areas of the county that are
15  outside the zoning jurisdiction of a municipality and that are
16  outside the 1.5-mile radius surrounding the zoning
17  jurisdiction of a municipality.
18  (c) If a county has elected to establish standards under
19  subsection (b), before the county grants siting approval or a
20  special use permit for a commercial wind energy facility or a
21  commercial solar energy facility, or modification of an
22  approved siting or special use permit, the county board of the
23  county in which the facility is to be sited or the zoning board
24  of appeals for the county shall hold at least one public
25  hearing. The public hearing shall be conducted in accordance
26  with the Open Meetings Act and shall be held not more than 60

 

 

  SB1365 - 4 - LRB104 10489 RTM 20564 b


SB1365- 5 -LRB104 10489 RTM 20564 b   SB1365 - 5 - LRB104 10489 RTM 20564 b
  SB1365 - 5 - LRB104 10489 RTM 20564 b
1  days after the filing of the application for the facility. The
2  county shall allow interested parties to a special use permit
3  an opportunity to present evidence and to cross-examine
4  witnesses at the hearing, but the county may impose reasonable
5  restrictions on the public hearing, including reasonable time
6  limitations on the presentation of evidence and the
7  cross-examination of witnesses. The county shall also allow
8  public comment at the public hearing in accordance with the
9  Open Meetings Act. The county shall make its siting and
10  permitting decisions not more than 30 days after the
11  conclusion of the public hearing. Notice of the hearing shall
12  be published in a newspaper of general circulation in the
13  county. A facility owner must enter into an agricultural
14  impact mitigation agreement with the Department of Agriculture
15  prior to the date of the required public hearing. A commercial
16  wind energy facility owner seeking an extension of a permit
17  granted by a county prior to July 24, 2015 (the effective date
18  of Public Act 99-132) must enter into an agricultural impact
19  mitigation agreement with the Department of Agriculture prior
20  to a decision by the county to grant the permit extension.
21  Counties may allow test wind towers or test solar energy
22  systems to be sited without formal approval by the county
23  board.
24  (d) A county with an existing zoning ordinance in conflict
25  with this Section shall amend that zoning ordinance to be in
26  compliance with this Section within 120 days after January 27,

 

 

  SB1365 - 5 - LRB104 10489 RTM 20564 b


SB1365- 6 -LRB104 10489 RTM 20564 b   SB1365 - 6 - LRB104 10489 RTM 20564 b
  SB1365 - 6 - LRB104 10489 RTM 20564 b
1  2023 (the effective date of Public Act 102-1123).
2  (e) A county may require:
3  (1) a wind tower of a commercial wind energy facility
4  to be sited as follows, with setback distances measured
5  from the center of the base of the wind tower:
6  Setback Description Setback Distance
7  Occupied Community 2.1 times the maximum blade tip
8  Buildings height of the wind tower to the
9  nearest point on the outside
10  wall of the structure
11  Participating Residences 1.1 times the maximum blade tip
12  height of the wind tower to the
13  nearest point on the outside
14  wall of the structure
15  Nonparticipating Residences 2.1 times the maximum blade tip
16  height of the wind tower to the
17  nearest point on the outside
18  wall of the structure
19  Boundary Lines of None
20  Participating Property

 

 

  SB1365 - 6 - LRB104 10489 RTM 20564 b


SB1365- 7 -LRB104 10489 RTM 20564 b   SB1365 - 7 - LRB104 10489 RTM 20564 b
  SB1365 - 7 - LRB104 10489 RTM 20564 b
1  Boundary Lines of 1.1 times the maximum blade tip
2  Nonparticipating Property height of the wind tower to the
3  nearest point on the property
4  line of the nonparticipating
5  property
6  Public Road Rights-of-Way 1.1 times the maximum blade tip
7  height of the wind tower
8  to the center point of the
9  public road right-of-way
10  Overhead Communication and 1.1 times the maximum blade tip
11  Electric Transmission height of the wind tower to the
12  and Distribution Facilities nearest edge of the property
13  (Not Including Overhead line, easement, or
14  Utility Service Lines to right-of-way
15  Individual Houses or containing the overhead line
16  Outbuildings)
17  Overhead Utility Service None
18  Lines to Individual
19  Houses or Outbuildings
20  Fish and Wildlife Areas 2.1 times the maximum blade
21  and Illinois Nature tip height of the wind tower
22  Preserve Commission to the nearest point on the

 

 

  SB1365 - 7 - LRB104 10489 RTM 20564 b


SB1365- 8 -LRB104 10489 RTM 20564 b   SB1365 - 8 - LRB104 10489 RTM 20564 b
  SB1365 - 8 - LRB104 10489 RTM 20564 b
1  Protected Lands property line of the fish and
2  wildlife area or protected
3  land
4  This Section does not exempt or excuse compliance with
5  electric facility clearances approved or required by the
6  National Electrical Code, the The National Electrical
7  Safety Code, the Illinois Commerce Commission, and the
8  Federal Energy Regulatory Commission, and their designees
9  or successors; .
10  (2) a wind tower of a commercial wind energy facility
11  to be sited so that industry standard computer modeling
12  indicates that any occupied community building or
13  nonparticipating residence will not experience more than
14  30 hours per year of shadow flicker under planned
15  operating conditions;
16  (3) a commercial solar energy facility to be sited as
17  follows, with setback distances measured from the nearest
18  edge of any component of the facility:
19  Setback Description Setback Distance
20  Occupied Community 150 feet from the nearest
21  Buildings and Dwellings on point on the outside wall
22  Nonparticipating Properties of the structure
23  Boundary Lines of None

 

 

  SB1365 - 8 - LRB104 10489 RTM 20564 b


SB1365- 9 -LRB104 10489 RTM 20564 b   SB1365 - 9 - LRB104 10489 RTM 20564 b
  SB1365 - 9 - LRB104 10489 RTM 20564 b
1  Participating Property
2  Public Road Rights-of-Way 50 feet from the nearest
3  edge
4  Boundary Lines of 50 feet to the nearest
5  Nonparticipating Property point on the property
6  line of the nonparticipating
7  property
8  (4) a commercial solar energy facility to be sited so
9  that the facility's perimeter is enclosed by fencing
10  having a height of at least 6 feet and no more than 25
11  feet; and
12  (5) a commercial solar energy facility to be sited so
13  that no component of a solar panel has a height of more
14  than 20 feet above ground when the solar energy facility's
15  arrays are at full tilt.
16  The requirements set forth in this subsection (e) may be
17  waived subject to the written consent of the owner of each
18  affected nonparticipating property.
19  (f) A county may not set a sound limitation for wind towers
20  in commercial wind energy facilities or any components in
21  commercial solar energy facilities that is more restrictive
22  than the sound limitations established by the Illinois
23  Pollution Control Board under 35 Ill. Adm. Code Parts 900,

 

 

  SB1365 - 9 - LRB104 10489 RTM 20564 b


SB1365- 10 -LRB104 10489 RTM 20564 b   SB1365 - 10 - LRB104 10489 RTM 20564 b
  SB1365 - 10 - LRB104 10489 RTM 20564 b
1  901, and 910.
2  (g) A county may not place any restriction on the
3  installation or use of a commercial wind energy facility or a
4  commercial solar energy facility unless it adopts an ordinance
5  that complies with this Section. A county may not establish
6  siting standards for supporting facilities that preclude
7  development of commercial wind energy facilities or commercial
8  solar energy facilities.
9  A request for siting approval or a special use permit for a
10  commercial wind energy facility or a commercial solar energy
11  facility, or modification of an approved siting or special use
12  permit, shall be approved if the request is in compliance with
13  the standards and conditions imposed in this Act, the zoning
14  ordinance adopted consistent with this Code, and the
15  conditions imposed under State and federal statutes and
16  regulations.
17  (h) A county may not adopt zoning regulations that
18  disallow, permanently or temporarily, commercial wind energy
19  facilities or commercial solar energy facilities from being
20  developed or operated in any district zoned to allow
21  agricultural or industrial uses.
22  (i) A county may not require permit application fees for a
23  commercial wind energy facility or commercial solar energy
24  facility that are unreasonable. All application fees imposed
25  by the county shall be consistent with fees for projects in the
26  county with similar capital value and cost.

 

 

  SB1365 - 10 - LRB104 10489 RTM 20564 b


SB1365- 11 -LRB104 10489 RTM 20564 b   SB1365 - 11 - LRB104 10489 RTM 20564 b
  SB1365 - 11 - LRB104 10489 RTM 20564 b
1  (j) Except as otherwise provided in this Section, a county
2  shall not require standards for construction, decommissioning,
3  or deconstruction of a commercial wind energy facility or
4  commercial solar energy facility or related financial
5  assurances that are more restrictive than those included in
6  the Department of Agriculture's standard wind farm
7  agricultural impact mitigation agreement, template 81818, or
8  standard solar agricultural impact mitigation agreement,
9  version 8.19.19, as applicable and in effect on December 31,
10  2022. The amount of any decommissioning payment shall be in
11  accordance with the financial assurance required by those
12  agricultural impact mitigation agreements.
13  (j-5) A commercial wind energy facility or a commercial
14  solar energy facility shall file a farmland drainage plan with
15  the county and impacted drainage districts outlining how
16  surface and subsurface drainage of farmland will be restored
17  during and following construction or deconstruction of the
18  facility. The plan is to be created independently by the
19  facility developer and shall include the location of any
20  potentially impacted drainage district facilities to the
21  extent this information is publicly available from the county
22  or the drainage district, plans to repair any subsurface
23  drainage affected during construction or deconstruction using
24  procedures outlined in the agricultural impact mitigation
25  agreement entered into by the commercial wind energy facility
26  owner or commercial solar energy facility owner, and

 

 

  SB1365 - 11 - LRB104 10489 RTM 20564 b


SB1365- 12 -LRB104 10489 RTM 20564 b   SB1365 - 12 - LRB104 10489 RTM 20564 b
  SB1365 - 12 - LRB104 10489 RTM 20564 b
1  procedures for the repair and restoration of surface drainage
2  affected during construction or deconstruction. All surface
3  and subsurface damage shall be repaired as soon as reasonably
4  practicable.
5  (k) A county may not condition approval of a commercial
6  wind energy facility or commercial solar energy facility on a
7  property value guarantee and may not require a facility owner
8  to pay into a neighboring property devaluation escrow account.
9  (l) A county may require certain vegetative screening
10  surrounding a commercial wind energy facility or commercial
11  solar energy facility but may not require earthen berms or
12  similar structures.
13  (m) A county may set blade tip height limitations for wind
14  towers in commercial wind energy facilities but may not set a
15  blade tip height limitation that is more restrictive than the
16  height allowed under a Determination of No Hazard to Air
17  Navigation by the Federal Aviation Administration under 14 CFR
18  Part 77.
19  (n) A county may require that a commercial wind energy
20  facility owner or commercial solar energy facility owner
21  provide:
22  (1) the results and recommendations from consultation
23  with the Illinois Department of Natural Resources that are
24  obtained through the Ecological Compliance Assessment Tool
25  (EcoCAT) or a comparable successor tool; and
26  (2) the results of the United States Fish and Wildlife

 

 

  SB1365 - 12 - LRB104 10489 RTM 20564 b


SB1365- 13 -LRB104 10489 RTM 20564 b   SB1365 - 13 - LRB104 10489 RTM 20564 b
  SB1365 - 13 - LRB104 10489 RTM 20564 b
1  Service's Information for Planning and Consulting
2  environmental review or a comparable successor tool that
3  is consistent with (i) the "U.S. Fish and Wildlife
4  Service's Land-Based Wind Energy Guidelines" and (ii) any
5  applicable United States Fish and Wildlife Service solar
6  wildlife guidelines that have been subject to public
7  review.
8  (o) A county may require a commercial wind energy facility
9  or commercial solar energy facility to adhere to the
10  recommendations provided by the Illinois Department of Natural
11  Resources in an EcoCAT natural resource review report under 17
12  Ill. Adm. Code Part 1075.
13  (p) A county may require a facility owner to:
14  (1) demonstrate avoidance of protected lands as
15  identified by the Illinois Department of Natural Resources
16  and the Illinois Nature Preserve Commission; or
17  (2) consider the recommendations of the Illinois
18  Department of Natural Resources for setbacks from
19  protected lands, including areas identified by the
20  Illinois Nature Preserve Commission.
21  (q) A county may require that a facility owner provide
22  evidence of consultation with the Illinois State Historic
23  Preservation Office to assess potential impacts on
24  State-registered historic sites under the Illinois State
25  Agency Historic Resources Preservation Act.
26  (r) To maximize community benefits, including, but not

 

 

  SB1365 - 13 - LRB104 10489 RTM 20564 b


SB1365- 14 -LRB104 10489 RTM 20564 b   SB1365 - 14 - LRB104 10489 RTM 20564 b
  SB1365 - 14 - LRB104 10489 RTM 20564 b
1  limited to, reduced stormwater runoff, flooding, and erosion
2  at the ground mounted solar energy system, improved soil
3  health, and increased foraging habitat for game birds,
4  songbirds, and pollinators, a county may (1) require a
5  commercial solar energy facility owner to plant, establish,
6  and maintain for the life of the facility vegetative ground
7  cover, consistent with the goals of the Pollinator-Friendly
8  Solar Site Act and (2) require the submittal of a vegetation
9  management plan that is in compliance with the agricultural
10  impact mitigation agreement in the application to construct
11  and operate a commercial solar energy facility in the county
12  if the vegetative ground cover and vegetation management plan
13  comply with the requirements of the underlying agreement with
14  the landowner or landowners where the facility will be
15  constructed.
16  No later than 90 days after January 27, 2023 (the
17  effective date of Public Act 102-1123), the Illinois
18  Department of Natural Resources shall develop guidelines for
19  vegetation management plans that may be required under this
20  subsection for commercial solar energy facilities. The
21  guidelines must include guidance for short-term and long-term
22  property management practices that provide and maintain native
23  and non-invasive naturalized perennial vegetation to protect
24  the health and well-being of pollinators.
25  (s) If a facility owner enters into a road use agreement
26  with the Illinois Department of Transportation, a road

 

 

  SB1365 - 14 - LRB104 10489 RTM 20564 b


SB1365- 15 -LRB104 10489 RTM 20564 b   SB1365 - 15 - LRB104 10489 RTM 20564 b
  SB1365 - 15 - LRB104 10489 RTM 20564 b
1  district, or other unit of local government relating to a
2  commercial wind energy facility or a commercial solar energy
3  facility, the road use agreement shall require the facility
4  owner to be responsible for (i) the reasonable cost of
5  improving roads used by the facility owner to construct the
6  commercial wind energy facility or the commercial solar energy
7  facility and (ii) the reasonable cost of repairing roads used
8  by the facility owner during construction of the commercial
9  wind energy facility or the commercial solar energy facility
10  so that those roads are in a condition that is safe for the
11  driving public after the completion of the facility's
12  construction. Roadways improved in preparation for and during
13  the construction of the commercial wind energy facility or
14  commercial solar energy facility shall be repaired and
15  restored to the improved condition at the reasonable cost of
16  the developer if the roadways have degraded or were damaged as
17  a result of construction-related activities.
18  The road use agreement shall not require the facility
19  owner to pay costs, fees, or charges for road work that is not
20  specifically and uniquely attributable to the construction of
21  the commercial wind energy facility or the commercial solar
22  energy facility. Road-related fees, permit fees, or other
23  charges imposed by the Illinois Department of Transportation,
24  a road district, or other unit of local government under a road
25  use agreement with the facility owner shall be reasonably
26  related to the cost of administration of the road use

 

 

  SB1365 - 15 - LRB104 10489 RTM 20564 b


SB1365- 16 -LRB104 10489 RTM 20564 b   SB1365 - 16 - LRB104 10489 RTM 20564 b
  SB1365 - 16 - LRB104 10489 RTM 20564 b
1  agreement.
2  (s-5) The facility owner shall also compensate landowners
3  for crop losses or other agricultural damages resulting from
4  damage to the drainage system caused by the construction of
5  the commercial wind energy facility or the commercial solar
6  energy facility. The commercial wind energy facility owner or
7  commercial solar energy facility owner shall repair or pay for
8  the repair of all damage to the subsurface drainage system
9  caused by the construction of the commercial wind energy
10  facility or the commercial solar energy facility in accordance
11  with the agriculture impact mitigation agreement requirements
12  for repair of drainage. The commercial wind energy facility
13  owner or commercial solar energy facility owner shall repair
14  or pay for the repair and restoration of surface drainage
15  caused by the construction or deconstruction of the commercial
16  wind energy facility or the commercial solar energy facility
17  as soon as reasonably practicable.
18  (s-10) The facility owner shall also compensate landowners
19  if the facility adversely affects the flow of water within the
20  landowner's land, including, but not limited to, by affecting
21  a drainage tile.
22  (t) Notwithstanding any other provision of law, a facility
23  owner with siting approval from a county to construct a
24  commercial wind energy facility or a commercial solar energy
25  facility is authorized to cross or impact a drainage system,
26  including, but not limited to, drainage tiles, open drainage

 

 

  SB1365 - 16 - LRB104 10489 RTM 20564 b


SB1365- 17 -LRB104 10489 RTM 20564 b   SB1365 - 17 - LRB104 10489 RTM 20564 b
  SB1365 - 17 - LRB104 10489 RTM 20564 b

 

 

  SB1365 - 17 - LRB104 10489 RTM 20564 b