CFR /  Title 47  /  Part 95  /  Sec. 95.21 GMRS system description.

A GMRS system is one or more transmitting units used by station operators to communicate messages. A GMRS system is comprised of:

(a) One or more station operators;

(b) One mobile station consisting of one or more mobile units (see Sec. 95.23 of this part);

(c) One or more land stations (optional);

(d) Paging receivers (optional); and

(e) Fixed stations (optional). [63 FR 68974, Dec. 14, 1998]