Okla. Stat. tit. 25, § 25-1202: Vital statistics — Gender identification

The state, any political subdivision, or any state agency or

department, including, but not limited to, public school districts,

that collects vital statistics for the purpose of gathering accurate

public health, crime, economic, or other data shall include, but not

be limited to, the identification of any natural person who is part

of the collected data as either male or female as defined in Section

16 of Title 25 of the Oklahoma Statutes.