5. The membership of the retirement system shall include:

   a. The members of the former "State Police Retirement and Benevolent Fund."

   b. Any person becoming a full-time commissioned officer, noncommissioned officer or trooper of the Division of State Police of the Department of Law and Public Safety of the State of New Jersey; provided that the Division of State Police certified that he has satisfied the age and health requirements prescribed for members of the State Police force.

   c. A person appointed to the Division of State Police under section 3 of P.L.1983, c.403 (C.39:2-9.3).

   d. A person appointed to the Division of State Police under section 1 of P.L.1997, c.19 (C.53:1-8.2).

   Membership in the retirement system is a condition of employment for such officers, non-commissioned officers and troopers.

   L.1965,c.89,s.5; amended 1983, c.403, s.37; 1997, c.19, s.7.