Whenever a public water supply system (a) is not in compliance with the Virgin Islands Primary Drinking Water Standards, (b) fails to perform monitoring required by regulations adopted by the Commissioner, (c) is subject to a variance granted for an inability to meet maximum contaminant level requirements, (d) is subject to an exemption or (e) fails to comply with the requirements prescribed by a variance or exemption, the system shall as soon as practicable notify the Commissioner of Health, the agency, the Administrator and communications media serving the area served by the system of that fact and the extent and nature and possible health effects of such fact. Such notice also shall be given by the system by publication in a newspaper of general circulation (as determined by the Commissioner) within the area served by such water system at least once every 3 months so long as the violation, variance or exemption continues. Such notice shall also be given with the water bills of the system so long as the violation, variance or exemption continues, as follows: If the water bills of a public water system are issued more often than once every 3 months, such notice shall be included in at least one water bill of the system for each customer every 3 months; if the system issues its water bills less often than once every 3 months, such notice shall be included in each of the water bills issued by the system for each customer. Provided, however, that the Commissioner may prescribe by regulations alternative notice requirements for systems principally serving nonresident users.