Okla. Stat. tit. 59, § 475.21
A. The practice of or offer to practice engineering or land surveying by firms registered under Section 475.1 et seq. of this title, or by more than one person acting individually through a firm, is permitted provided:
2. Said firm has been issued a certificate of authorization by the Board.
All final drawings, specifications, plans, reports, land surveys, plats, land descriptions, calculations or other engineering or land surveying papers or documents involving the practice of engineering or land surveying, as defined in Section 475.1 et seq. of this title, when issued or filed for public record, shall be dated and bear the signature and seal of the professional engineer or the professional land surveyor, qualified in the appropriate branch of engineering or land surveying, who prepared them or under whose immediate direction they were prepared.
B. An engineering or land surveying firm desiring a certificate of authorization shall file with the Board an application, using a form provided by the Board, and provide all the information required by the Board. The Board shall prescribe a form to be filed with the renewal fee and which shall be updated within thirty (30) days of the time any information contained on the form is changed or differs for any reason. If, in the Board's judgment, the information contained on the form warrants such action, the Board shall issue a certificate of authorization for said firm to practice engineering or land surveying and to contract and collect fees for furnishing these services.
No such firm shall be relieved of responsibility for the conduct or acts of its agents, employees, officers or partners by reason of its compliance with the provisions of this section. No individual practicing engineering or land surveying, pursuant to the provisions of Section 475.1 et seq. of this title, shall be relieved of responsibility for engineering or land surveying services performed by reason of his employment or other relationship with a firm holding an authorization certificate.
Laws 1968, SB 524, c. 245, § 21, emerg. eff. April 26, 1968; Amended by Laws 1982, SB 616, c. 297, § 21; Amended by Laws 1992, SB 799, c. 165, § 18, emerg. eff. July 1, 1992.