After the notice is served upon the persons as aforesaid
and posted, it shall be unlawful for any person to proceed thereafter with
any construction operation whatsoever on the premises, and the permit which
has been so revoked shall be null and void, and before any construction or
operation is again resumed, a new permit, as required by this chapter, shall
be procured and fees paid therefor, and thereafter the resumption of any construction
or operation shall be in compliance with the regulation of this chapter. However,
such work as the Public Works Director or City Clerk may order as a condition
precedent to the reissuance of the building permit may be performed, or such
work as he may require for the preservation of life and safety.