Upon receiving a request for mutual aid in an occurrence or for assistance from a requesting party in a municipal, county, state, or federal state of emergency, a participating governmental entity may, subject to the approval of the chief executive officer of the governmental entity, an emergency management employee or official, or the chief executive officer of a governmental utility system, as defined in § 58-8-115(c), as applicable, send its personnel and equipment outside its boundaries and into any other jurisdiction necessary to respond to the request.