Except as provided in this section, nothing herein
shall require any change in the plans, construction or designated
use of a building or structure for which a building permit has been
lawfully issued prior to or, under the circumstances noted below,
within 60 days after the effective date of this chapter, provided
that the proposed use complies with the use requirements of this chapter,
and further provided that construction shall begin within six months
of the date of such permit; the foundation or 15% of the construction
valuation shall be completed within one year of the date of such permit;
and the entire building or structure shall be completed within two
years of the date of such permit. In addition, if the Building Official
determines that an application (with accompanying construction plans)
for a building permit filed prior to the effective date of this chapter
meets all requirements of the Zoning Chapter in existence as of the
date immediately prior to the effective date of this chapter, has
received all necessary conditional or final approvals by the City
Council or the Board of Appeals and complies with the use requirements
of this chapter, then the Building Official shall issue all necessary
permits within a reasonable time, but not longer than 60 days from
such date, provided the applicant has taken all steps deemed necessary
by the Building Official to obtain such permit and submitted complete
applications.