Assigned frequency channels in the band 38,600-40,000 MHz may be subdivided and used anywhere in the authorized service area, subject to the following terms and conditions:
(a) No interference may be caused to a previously existing station operating in another authorized service area;
(b) Each operating station must have posted a copy of the service area authorization; and
(c) The antenna structure height employed at any location may not exceed the criteria set forth in Sec. 17.7 of this chapter unless, in each instance, authorization for use of a specific maximum antenna structure for each location has been obtained from the FAA prior to the erection of the antenna.