Okla. Stat. tit. 27A, § 2-7-122
The Department shall not assess an annual fee for the on-site disposal of hazardous waste by underground injection which exceeds Fifty Thousand Dollars ($50,000.00).
Laws 1992, HB 2445, c. 201, § 7, emerg. eff. May 12, 1992; Amended by Laws 1993, HB 1002, c. 145, § 105, emerg. eff. July 1, 1993; Renumbered from 63 O.S. § 1-2002.a by Laws 1993, HB 1002, c. 145, § 359, emerg. eff. July 1, 1993.