Section 87.51 - Aircraft earth station commissioning(b) Aircraft earth stations authorized to operate in the Inmarsat space segment must display the Commission license together with the commissioning certificate issued by Inmarsat. Notwithstanding the requirements of this paragraph, aircraft earth stations may operate in the Inmarsat space segment without an Inmarsat-issued commissioning certificate if written approval is obtained from Inmarsat in addition to the license from the Commission.57 FR 45749, Oct. 5, 1992, as amended at 63 FR 68957, Dec. 14, 1998