Any person receiving benefits from the Oklahoma Firefighters Pension and Retirement System as of June 30, 1986, shall receive a six percent (6%) increase in said benefits on July 1, 1986. The provisions of this section shall not apply to members receiving Added by Laws 1985, c. 222, § 12, emerg. eff. July 8, 1985. Amended by Laws 1986, c. 187, § 2, operative July 1, 1986.