Sec.  90.419   Points of communication.

   Normally, operations licensed under this part are intended to provide
   intrastation mobile communications. For example, a base station is intended
   to communicate with its associated mobile stations and mobile stations are
   intended to communicate between associated mobile stations and associated
   base stations of the licensee. Accordingly, operations between base stations
   at fixed locations are permitted only in the following situations:

   (a) Base stations licensed under subpart T of this part and those in the
   Public Safety Pool that operate on frequencies below 450 MHz, may
   communicate on a secondary basis with other base stations, operational fixed
   stations, or fixed receivers authorized in these services or pools.

   (b) Base stations licensed on any frequency in the Industrial/Business Pool
   and on base stations frequencies above 450 MHz in the Public Safety Pool may
   communicate on a secondary basis with other base stations, operational fixed
   stations, or fixed receivers authorized in these pools only when:

   (1) The messages to be transmitted are of immediate importance to mobile
   stations; or

   (2) Wireline communications facilities between such points are inoperative,
   economically impracticable, or unavailable from communications common
   carrier sources. Temporary unavailability due to a busy wireline circuit is
   not considered to be within the provisions of this paragraph.

   (c) Operational fixed stations may communicate with units of associated
   mobile stations only on a secondary basis.

   (d) Operational fixed stations licensed in the Industrial/Business Pool may
   communicate on a secondary basis with associated base stations licensed in
   these services when:

   (1) The messages to be transmitted are of immediate importance to mobile
   stations; or

   (2) Wireline communications facilities between such points are inoperative,
   economically impracticable, or unavailable from communications common
   carrier sources. Temporary unavailability due to a busy wireline circuit is
   not considered to be within the provisions of this paragraph.

   (e) Travelers' Information Stations are authorized to transmit certain
   information to members of the traveling public (see  Sec. 90.242).

   (f) CMRS Licensees in the SMR categories of part 90, subpart S, CMRS
   providers authorized in the 220 MHz service of part 90, subpart T, CMRS
   paging operations as defined by part 90, subpart P and for-profit
   interconnected business radio services with eligibility defined by section
   90.75 are permitted to utilize their assigned spectrum for fixed services on
   a co-primary basis with their mobile operations.

   [ 61 FR 45356 , Aug. 29, 1996, as amended at  62 FR 18933 , Apr. 17, 1997]