Moving to Oklahoma as a master plumber: every state's rule

Oklahoma has no 'master plumber' title; its highest person-held plumbing credential is the Plumbing Contractor license, which CIB describes as 'the highest ranking plumbing license' and issues to an individual who passes the two-part contractor exam (technical trade and Plumbing Business and Law, 75% on each part, PSI, $92 per portion). This site maps the Unlimited Plumbing Contractor license to the master level. An applicant needs the journeyman qualifications plus one additional year, so four years (about 8,000 hours) of verifiable plumbing experience, and pays $330 ($30 application plus $300 initial license). After passing, the license is inactive until the contractor files a $5,000 corporate surety bond (or $5,000 cash or certificate of deposit) and a $50,000 commercial general liability certificate with CIB; only a licensed contractor may contract for plumbing work, and the licensee may operate as an individual, firm, LLC or corporation. CIB's Arkansas agreement covers journeymen only, so no state has contractor reciprocity with Oklahoma; out-of-state masters and contractors use exam equivalency where available or sit the full exam. Licenses renew annually ($200) with six hours of continuing education every 36 months.