Any municipality electing to cover both its municipal firemen and municipal police under the system created by this Article III shall be required to pass separate ordinances or resolutions covering each class of employes.
The board shall maintain separate accounting records for municipal firemen and for municipal police. However, in the interest of good investment practice, the board may, in its discretion, commingle moneys received from municipalities, municipal employes, municipal firemen and municipal police.
53 P.S. § 881.304