Any municipality within Prince George's County may, by the adoption of an Ordinance or Resolution, exempt burglar alarm users within the municipal boundaries from the licensing requirements of Division 2, Subdivision 2 provided that such municipality provides 24-hour per day, 7-day per week on-duty police coverage, and meets such other standards insuring adequate municipal police coverage as the Chief of Police may establish by regulation. The exemption shall be effective upon delivery of a copy of such Ordinance or Resolution to the Chief of Police. When a municipality has exempted burglar alarm users from the application of Division 2, Subdivision 2, the County Police shall not be required to respond to burglar alarms within the municipal limits, but may do so at their discretion.