Okla. Stat. tit. 72, § 72-304: Number of months

Each qualified veteran shall be entitled to one (1) month's

tuition-free schooling for each month of active duty service between

the dates of August 10, 1964, and December 31, 1976, with a maximum

of thirty-six (36) months tuition-free schooling. Time spent in

reserve status with the Oklahoma National Guard or various other

reserve components of the United States Military shall not be

considered as active duty time.