Section 74.34 - Period of construction; certification of completion of construction(a) Each aural and television broadcast auxiliary station authorized under subparts E and F of this part must be in operation within 18 months from the initial date of grant.(b) Each remote pickup broadcast auxiliary station authorized under subpart D of this part must be in operation within 12 months from the initial date of grant.(c) Failure to timely begin operation means the authorization terminates automatically.(d) Requests for extension of time may be granted upon a showing of good cause pursuant to § 1.946(e) of this chapter.(e) Construction of any authorized facility or frequency must be completed by the date specified in the license and the Commission must be notified pursuant to § 1.946 of this chapter. 68 FR 12763 , Mar. 17, 2003