47 CFR §27.51

1. (a)Each transmitter utilized for operation under this part must be of a type that has been authorized by the Commission under its certification procedure.
2. (b)Any manufacturer of radio transmitting equipment to be used in these services may request equipment authorization following the procedures set forth in subpart J of part 2 of this chapter. Equipment authorization for an individual transmitter may be requested by an applicant for a station authorization by following the procedures set forth in part 2 of this chapter.