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Attachment A - Joint Agreement for 800 MHz CCCS Page 63 of 83 Each agency shall determine if encryption will be used on its own agency -specific talkgroups. Certain common/interoperable talkgroups allocated to specific disciplines such as law/fire will be encrypted in all System radios. Non -encrypted common/interoperable talkgroups will also be available to System users who do not have encrypted radios. Care should be taken when assigning encrypted talkgroups to incident communications to ensure all applicable users have encrypted radios. Management The Lead Agency manages the encryption policy and the programming of encryption Into all radios on the System. 6.0 INTEROPERABILITY STANDARDS 6.1 Interoperable Communications Requirements Purpose or Objective Establishes a minimum requirement for interoperable communications resources for all radios using the System. Technical Background For the purpose of this document, the terms'mutual aid' and `interoperability' will be used interchangeably. The term 'channel' will refer to a conventional resource. The planners of the System recognized the need to make common interoperable talkgroups available to all subscribers primarily for interagency and incident command communications. Therefore, in addition to agency -specific talkgroups, the System also provides talkgroups that are common to like -disciplined agencies (law, fire, public works, lifeguard) as well as talkgroups that are available to all System users to provide interoperability, between disciplines. In addition to common System talkgroups, subscriber radios will also be programmed with local, state and national conventional interoperable channels. Most of these conventional interoperable channels are not encrypted but there are a few 700MHz encrypted channels available In encryption -capable radios. Operational Context Interoperable talkgroups & channels are used when there is a need to coordinate activities between different agencies and/or personnel assigned to work an event. Efforts should be made to utilize the lowest level of interoperable talkgroup/channel first if possible. For example, OC law agencies needing to coordinate with other law agencies should use the CCCS law interoperability talkgroups/channels before considering national level interoperable channels. If the coordination includes agencies that do not have access to the CCCS interoperable law talkgroups, statewide or national interoperable channels would be selected. Additional Information on the operational use of these interoperable talkgroups/channels can be found in the 'Official Communications Handbook' (Radio Code Book).