Okla. Stat. tit. 22, § 22-37: Distinctive uniforms for police officers - Exceptions

The governing bodies of the state, county, city or town, as the

case may be, may furnish distinctive uniforms for all sheriffs,

deputy sheriffs, policemen, town marshals, peace officers and other

officers, whose duty is to preserve and enforce public peace. When

uniforms are furnished the sheriffs, deputy sheriffs, policemen,

town marshals, peace officers, as the case might be, they are

required to wear the same while on duty. This act shall not apply

to detectives and other officers required to wear street apparel.