Section 5.71 - License period(a)Conventional experimental radio licenses.(1) The regular license term is 2 years. An applicant may request a license term up to 5 years, but must provide justification for a license of that duration.(2) A license may be renewed for an additional term not exceeding 5 years, upon an adequate showing of need to complete the experiment.(b)Program, medical testing, and compliance testing experimental radio licenses. Licenses are issued for a term of 5 years and may be renewed for up to 5 years upon an adequate showing of need.(c)Broadcast experimental radio license. Licenses are issued for a one-year period and may be renewed for an additional term not exceeding 5 years, upon an adequate showing of need.(d)Spectrum Horizons experimental radio license. Licenses are issued for a term of 10 years and may not be renewed. 78 FR 25162 , Apr. 29, 2013, as amended at 84 FR 25690 , June 4, 2019