Okla. Stat. tit. 59, § 59-1151.17

registration certificate number.

A. When applying for any permit required by the state or any of

its political subdivisions for roofing services or jobs, a roofing

contractor shall supply the permit-issuing official that roofing

contractor's registration certificate number issued pursuant to the

Roofing Contractor Registration Act. That official shall enter a

roofing contractor's registration number on the permit. The

registrar may investigate any roofing project for purposes of

verifying roofing contractor registration or permit verification.

Oklahoma Statutes - Title 59. Professions and Occupations Page 939

B. A person performing as a roofing contractor on his or her

own property, although exempt from the registration requirements of

the Roofing Contractor Registration Act, shall, when applying for a

permit required for the project, supply the permit-issuing official

any roofing contractor registration number, as soon as available, of

each roofing subcontractor engaged in roofing services and doing

work covered by the permit, if any. That official shall enter each

roofing contractor registration number so supplied before inspection

of the job.

C. A roofing contractor shall display his or her roofing

contractor registration number issued pursuant to the Roofing

Contractor Registration Act on every business sign, card,

correspondence, and contract used to solicit and conduct roofing

services in this state and shall display the roofing firm name,

existence of any commercial roofer endorsement, and the roofing

contractor registration number bearing the initials "OK" preceding

that registration number issued by the registrar on all vehicles

used to transport materials in the operation of the business. Such

names, endorsements, and numbers shall be printed in letters and

numerals at least two (2) inches in height in a conspicuous location

on both sides of each vehicle in contrasting color to the background

color.

D. Each registrant shall post in a conspicuous place on each

job site the name, existence of any commercial roofer endorsement,

registration number, and telephone number for the registration under

which any work is being performed, and on all media containing the

registrant's name, including but not limited to magnetic signs on

vehicles, business cards, contracts, bids, letterhead, signs, and

advertisements.