In order to interface the separate Department of Arkansas State Police communications system with that of the statewide law enforcement communications system:
(1) All municipal and county law enforcement agencies should install receivers on the frequency of the district of the Department of Arkansas State Police in which their county or city is located, at their base stations and in their vehicles so that effective cross banding of communications with the department can be accomplished when necessary;
(2) All department district headquarters will monitor the statewide base-to-base frequency, thirty-seven and two tenths megahertz (37.20 MHz), and the statewide emergency frequency, thirty-seven and twenty-four hundredths megahertz (37.24 MHz), and respond to calls by transmitting on the frequency of the district of the department in which their county or city is located, which will be monitored by local law enforcement agencies;
(3) All department mobile units will have the capability to monitor the emergency frequency, thirty-seven and twenty-four hundredths megahertz (37.24 MHz), and respond to calls by transmitting on the frequency of the district of the department in which their county or city is located, which will be monitored by local law enforcement agencies; and
(4) With the permission of the department, counties may, at their own expense, place complete mobile radios with the assigned county frequency in department vehicles.