Sec. 24.103, the authorization will automatically expire. Before the 
period for construction expires an application for an extension of time 
to complete construction (FCC Form 489) may be filed. See paragraph (b) 
of this section. Within 30 days after the authorization expires an 
application for reinstatement may be filed on FCC Form 489.
    (b) An application for extension of time to complete construction 
may be made on FCC Form 489. Extension of time requests must be filed 
prior to the expiration of the construction period. Extensions will be 
granted only if the licensee shows that the failure to complete 
construction is due to causes beyond his control. An application for 
modification of an authorization (under construction) does not extend 
the initial construction period. If additional time to construct is 
required, an FCC Form 489 must be submitted.