47 C.F.R. § 101.1413
(b) As a construction requirement, MVDDS licensees must make a showing of substantial service at the end of five years into the license period and ten years into the license period. The substantial service requirement is defined as a service that is sound, favorable, and substantially above a level of mediocre service which might minimally warrant renewal. At the end of five years into the license term and ten years into the license period, the Commission will consider factors such as:
[69 FR 31746, June 7, 2004, as amended at 82 FR 41549, Sept. 1, 2017; 90 FR 57713, Dec. 12, 2025]