All firefighters in the state whose fire department provides fire protection services to a participating municipality, as defined in paragraph 9 of Section 49-100.1 of this title, on or after the effective date of this act¹ shall be governmental employees, as described in Internal Revenue Service Revenue Ruling 1989-49, 1989-1 CB 117, and shall be members of the Oklahoma Firefighters Pension and Retirement System. The Oklahoma Firefighters Pension and Retirement Board shall determine whether a firefighter is a governmental employee as defined in this section.