Relating to the treatment and recycling for beneficial use of certain waste arising out of or incidental to the drilling for or production of oil or gas.
Relating to the effect of rules and standards adopted by the Railroad Commission of Texas relating to the gas pipeline industry on ordinances, orders or rules adopted by political subdivisions.
Relating to the essential knowledge and skills of the required public school curriculum and to certain state-adopted or state-developed assessment instruments for public school students.