Okla. Stat. tit. 59, § 59-1040
Acting as or performing work of building and construction
inspector without a license - Violation - Effective date.
Beginning February 1, 1990, it shall be unlawful for any person
to act as or perform the work of a building and construction
inspector unless such person is qualified and licensed as a building
and construction inspector pursuant to the Oklahoma Inspectors Act.