Section 106.4.3 is amended to read as follows:

106.4.3 Expiration. Every permit issued shall become invalid unless the work on the site authorized by such permit is commenced within 180 days after its issuance, or if the work authorized on the site by such permit is suspended or abandoned for a period of 180 days after the time the work is commenced. Before such work recommences, a new permit shall be first obtained and the fee, therefor, shall be one-half the amount required for a new permit for such work, provided no changes have been made in the original construction documents for such work and provided further that such suspension or abandonment has not exceeded one year.

The director is authorized to grant, in writing, one or more extensions of time, for periods not more than 180 days each. The extension shall be requested in writing prior to the expiration of the permit and justifiable cause demonstrated.