Okla. Stat. tit. 59, § 59-1820.4: Exemptions

The Fire Extinguisher Licensing Act shall not apply to:

1. An officer or employee of this state, the United States, or

a political subdivision, while the employee or officer is engaged in

the performance of his or her official duties;

2. A person who owns and installs fire extinguishing equipment

in his or her own single-family dwelling or, if the person does not

charge for the device or its installation, installs the fire

extinguishing equipment for the protection of his or her personal

property and does not install the fire extinguishing equipment as a

normal business practice in a single-family dwelling of another; or

3. The sale of fire extinguishers designed or intended for

customer or user installation.