As used in this act:
1. "Frac tank" means any portable or stationary, high volume holding vessel designed and constructed for use in separating, storing or temporarily holding materials used in or resulting from fracturing techniques in oil and gas exploration;2. "Fracturing" means any processes, chemicals or other materials used to enhance an oil and gas well recovery operation;3. "Manway" means any opening on a frac tank allowing a person ingress into or egress from the interior of the vessel; and4. "Unprotected" means a manway without grates, bars or other means of halting unexpected ingress into or egress from the interior of the vessel.Okla. Stat. tit. 17, § 54
Laws 1981, SB 5, c. 153, § 1, eff. 10/1/1981.