All members of the Virgin Islands fire service shall perform such duties as may be required by the Director, Virgin Islands Fire Service. Members of the service shall have the power to prevent all persons not belonging to the service, or not acting under proper authority, from entering any fire station or handling any fire apparatus belonging to the service. Every member of the service shall be furnished with a copy of the rules and regulations prescribed by the Director, Virgin Islands Fire Service. The fire service in the District of St. Thomas-St. John and the fire service in the District of St. Croix may each be organized into systems of four platoons, each of which shall be on duty for alternating shifts of 24 hours or they may be organized into shifts of eight or sixteen hours each. No member of the service shall be required to serve more than a total of seven 24-hour shifts during two consecutive two-week pay periods without overtime compensation as provided by section 560 of Title 3 of this Code; Provided, That drills and exercise, held not more than once per week, shall not be considered in computing overtime compensation.