Your chief may be a great chief, but he doesn't know anything about FCC rules. With written agreements between agencies, frequencies can be shared between agencies. Without those agreements, the FCC sez:
§ 90.427 Precautions against unauthorized operation.
(b) Except for frequencies used in accordance with
§ 90.417, no person shall program into a transmitter frequencies for which the licensee using the transmitter is not authorized.
That includes hobbyists and amateur radio operators plugging in Part 90 frequencies into their radios "just in case"….
For the hobbyists and AR operators these rules are in effect in addition to 90.427...
§ 1.902 Scope.
In case of any conflict between the rules set forth in this subpart and the rules set forth in parts 13, 20, 22, 24, 27, 30, 74, 80, 87, 90, 95, 96, 97, and 101 of title 47, chapter I of the Code of Federal Regulations, the rules in this part shall govern.
[
83 FR 60, Jan. 2, 2018]
§ 1.903 Authorization required.
(a)
General rule. Stations in the Wireless Radio Services
must be used and operated only in accordance with the rules applicable to their particular service as set forth in this title and with a valid authorization granted by the Commission under the provisions of this part, except as specified in
paragraph (b) of this section.
(b)
Restrictions. The holding of an authorization does not create any rights beyond the terms, conditions and period specified in the authorization. Authorizations may be granted upon proper application, provided that the Commission finds that the applicant is qualified in regard to citizenship, character, financial, technical and other criteria, and that the public interest, convenience and necessity will be served.
See §§ 301, 308, and 309, 310 of this chapter.
