Okla. Stat. tit. 25, § 25-90.29: Daylight saving standard

A. If a federal law is passed that authorizes states to observe

daylight saving time year-round, this state shall adopt daylight

saving time as the year-round standard of time for the entire state

and all its political subdivisions.

B. This section shall not be construed to affect the standard

time established by federal law governing the movement of common

carriers engaged in interstate commerce or the time for performance

of an act by an officer or department of the United States, as

established by a statute, lawful order, rule, or regulation of the

United States or an agency thereof.