Okla. Stat. tit. 59, § 59-1850.2

As used in the Mechanical Licensing Act:

1. "Air conditioning system" means the process of treating air

by controlling its temperature, humidity, and cleanliness, to meet

the requirements of a designated area;

2. "Committee" means the Committee of Mechanical Examiners;

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3. “Board” means the Construction Industries Board;

4. "Gas piping" means and includes all natural gas piping

within or adjacent to any building, structure, or conveyance, on the

premises and to the connection with a natural gas meter, regulator,

or other source of supply;

5. "Heating systems" means and includes systems consisting of

air heating appliances from which the heated air is distributed and

shall include any accessory apparatus and equipment installed in

connection therewith;

6. "Mechanical contractor" or "contractor" means any person

engaged in the business of planning, contracting, supervising or

furnishing labor or labor and materials for mechanical work;

7. "Mechanical journeyman" or "journeyman" means any person

other than a contractor or apprentice who engages in mechanical

work;

8. "Mechanical apprentice" or "apprentice" means any person

sixteen (16) years of age or older whose principal occupation is

learning mechanical work on the job under the direct supervision of

a journeyman or contractor;

9. "Mechanical firm" means any corporation, partnership,

association, proprietorship, limited liability company, or other

business entity which plans or engages, or offers to engage, in

mechanical work for another within this state;

10. "Mechanical work" means the installation, maintenance,

repair, or renovation, in whole or in part, of any heating system,

exhaust system, cooling system, mechanical refrigeration system or

ventilation system or any equipment or piping carrying chilled

water, air for ventilation purposes, or natural gas, or the

installation, maintenance, repair, or renovation of process piping

used to carry any liquid, substance, or material, including steam

and hot water used for space heating purposes not under the

jurisdiction of the Department of Labor other than minor repairs to

such systems;

11. "Refrigeration system" means the installation, repairing and

servicing of a system employing a fluid which normally is vaporized

and liquefied in an air conditioning system, food preservation

measure or manufacturing process;

12. "Sheet metal" means the erection, installation and

repairing of all ferrous or nonferrous duct work and all other

materials used in all air conditioning and exhaust systems;

13. "Temporary mechanical journeyman" means any person other

than a person permanently licensed as a mechanical journeyman or

contractor in this state who meets the temporary licensure

requirements of Section 1850.8A of this title; and

14. "Variance and Appeals Board" means the Oklahoma State

Mechanical Installation Code Variance and Appeals Board.

Oklahoma Statutes - Title 59. Professions and Occupations Page 1304