An applicant for an operational fixed station must certify that:
(a) The applicant is the licensee of an aeronautical land station in the aeronautical mobile service; and(b) Common carrier facilities are not available to satisfy the aeronautical station's requirements.
47 C.F.R. §87.447
53 FR 28940, Aug. 1, 1988, as amended at 63 FR 68958, Dec. 14, 1998