Okla. Stat. tit. 11, § 11-49-101.1

An eligible employer joining the Oklahoma Firefighters Pension

and Retirement System on or after July 1, 2000, may purchase up to

five (5) years of credited service for each volunteer member of a

volunteer fire department at the annual contribution rate in effect

as of the date of the purchase, provided verifiable evidence of

active firefighter service for the purchased years for each

individual is provided to the System. Even though the participating

Oklahoma Statutes - Title 11. Cities and Towns Page 528

municipality is exempt from contributions, contributions must be

paid for a volunteer firefighter to receive purchased credited

service. Payment for purchased credited service must be received by

the System within six (6) months of the date the eligible employer

becomes a participating municipality, and may be paid by the

individual member. Six (6) months from the date the eligible

employer becomes a participating municipality, any eligible prior

credited service not purchased shall expire and not be available for

determining benefits. Eligibility to receive purchased credited

service shall be limited to those members of the new volunteer fire

department enrolled at the time the eligible employer applies for

affiliation with the System pursuant to Section 49-105.2 of Title 11

of the Oklahoma Statutes.