Sec.  90.465   Control of systems of communication.

   (a) Depending on design considerations, control of a system of communication
   may be exercised in varying ways. In single frequency simplex, base/mobile
   operations, control may be exercised by the control operator at the fixed
   control point. In mobile relay systems, where there is an associated control
   point or control station, control may be exercised by the operator at the
   control point or control station. In mobile-only systems, control may be
   exercised  by  the mobile operator. In communication systems involving
   multiple base stations or fixed relays control of the system may result from
   a combination of factors and considerations, including control by a fixed
   control point operator at some point within the system of communication or
   control by the mobile station operator of the licensee.

   (b) In internal systems, as defined in  Sec. 90.7, control may be maintained by
   conforming the system to the requirements of  Sec.  Sec. 90.471 through 90.475.

   (c)  In  interconnected  systems,  as defined in  Sec. 90.7, control may be
   maintained by conforming operation and system design to that permitted in
    Sec.  Sec. 90.477 through 90.483.

   [ 43 FR 54791 , Nov. 22, 1978, as amended at  54 FR 39740 , Sept. 28, 1989;  72 FR 35199 , June 27, 2007]