A. 1. No person shall install, replace or repair gas piping unless such person is licensed under the Mechanical Licensing Act or is licensed as a plumbing contractor or journeyman plumber pursuant to the laws of this state.

2. No person shall install, replace or repair floor furnaces or wall heaters unless such person is licensed under the Mechanical Licensing Act or is licensed as a plumbing contractor or journeyman plumber pursuant to the laws of this state.

3. No person shall install, replace or repair any radiant-floor heating systems unless such person is licensed under the Mechanical Licensing Act or is licensed as a plumbing contractor or journeyman plumber pursuant to the laws of this state.

B. The Mechanical Licensing Act shall not apply to:

1. A person who is the property owner of record, or his or her authorized representative, when performing minor repair which shall include, but not be limited to, cleaning, adjusting, calibrating and repair of mechanical system parts and the replacement of fuses and room thermostats, and other minor repairs which shall not include any repair which could violate the safe operation of the equipment;

2. The installation of portable, self-contained, ductless air conditioners or heaters;

3. The setting or connecting of detached air conditioning units which utilize flexible ductwork on a manufactured home. The term manufactured home shall have the same definition as such term is defined in Section 1102 of Title 47 of the Oklahoma Statutes;

4. Any permanent employee of a manufacturing facility, whether owned or leased, while performing mechanical work on the premises of such facility. The performance of such mechanical work authorized by this paragraph shall not violate any manufacturer specification or compromise any health or safety standards and practices in accordance with state and federal regulations;

5. The service, repair and installation of boilers, pressure vessels and welded steam lines which are subject to the jurisdiction of the Commissioner of Labor pursuant to the provisions of the Boiler and Pressure Vessel Safety Act; or

6. Employees of state-owned institutions doing maintenance to state-owned facilities which does not violate manufacturer specifications nor compromise health or safety standards and practices.

C. The licensing requirements of the Mechanical Licensing Act shall not apply to public utilities, public service corporations, intrastate gas pipeline companies, gas gathering pipeline companies, gas processing companies, rural electric associations, or municipal utilities and their subsidiaries during work on their own facilities or during the performance of energy audits, operational inspections, minor maintenance, or minor repairs for their customers or on their own equipment.

D. The licensing requirements of the Mechanical Licensing Act shall not apply to contractors, the contractor's employees, employees of chemical plants, gas processing plants, intrastate gas pipelines, gas gathering pipelines and petroleum refineries during work on their own facilities or during the performance of operational inspections, mechanical work, maintenance, or repairs on their own equipment, the performance of which does not violate any manufacturer specification or compromise any health or safety standards and practices in accordance with state and federal regulations.

E. The licensing requirements of the Mechanical Licensing Act shall not apply to employees of research facilities during work on their own facilities or during the performance of operational inspections, mechanical work, maintenance, or repairs on their own equipment used solely for research purposes when such items of equipment require one or more details of construction not covered by normally used national codes and standards or which involve destruction or reduce life of the equipment and systems.

Added by Laws 1987, c. 93, § 10, eff. Nov. 1, 1987. Amended by Laws 1989, c. 331, § 2, emerg. eff. May 31, 1989; Laws 1992, c. 137, § 2, eff. Sept. 1, 1992; Laws 1997, c. 353, § 5, eff. Nov. 1, 1997; Laws 2004, c. 163, § 8, emerg. eff. April 26, 2004; Laws 2014, c. 410, § 1.