Section 478.21 - Nonuse - revocation of franchise - extensions of time1. If the improvement for which a franchise is granted is not constructed in whole or in part within two years from the date the franchise is granted, or within two years after final unappealable disposition of judicial review of a franchise order or of condemnation proceedings, the franchise shall be forfeited and the utilities board which granted the franchise shall revoke the franchise and make a record of the revocation, unless the person holding the franchise petitions the board for an extension of time.2. Upon a showing of sufficient justification for the delay of construction, the board may grant one or more extensions of time for periods up to two years for each extension.C24, 27, 31, 35, 39, §8329; C46, 50, 54, 58, 62, § 489.20; C66, 71, 73, 75, § 489.21; C77, 79, 81, § 478.21 94 Acts, ch 1136, §5; 2002 Acts, ch 1097, §3