Okla. Stat. tit. 40, § 40-142.2: Inspection by Department of Labor

A. The Department of Labor shall have authority to have access

to and inspect any equipment including compression equipment and

storage tanks, practices or methods used by or in association with

any public access compressed natural gas fueling station or pump or

any hydrogen fueling station or pump.

B. The Department may promulgate rules as necessary to

implement the provisions of this section.