Ditto, there's a definition.
SECTION 201
GENERAL
201.1 Scope. Unless otherwise expressly stated, the following words and terms shall, for the purposes of this code, have the meanings shown in this chapter.
AGENCY. Any emergency responder department within the jurisdiction that utilizes radio frequencies for communication. This could include, but not be limited to, various public safety agencies such as fire departments, emergency medical services and law enforcement.
Commentary: This definition provides clarification as to the primary emergency responders that are intended to be included in the term, but does not rule out other responders who might also need the use of the emergency responders radio coverage system (ERRCS), based on the needs and policies of the adopting jurisdiction.