Okla. Stat. tit. 59, § 59-1850.10: Application of act - Exemptions

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

ng 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.