Whenever the Board of Trustees, by resolution, authorizes a public hearing on a proposed amendment to this chapter, and for a period of 90 days following the date of such resolution or until the proposed amendment has been acted upon by the Board of Trustees, whichever is sooner:
A. No permits for the erection, enlargement or alteration of any building or structure in any district which might be affected by the proposed amendment set for public hearing by the Board of Trustees shall be issued unless the Board of Trustees shall authorize issuance of such permit after a public hearing on 15 days' notice by publication and after determination by such Board of Trustees that issuance thereof shall be consistent with the health, safety, morals and general welfare of the Village of Larchmont; and
B. Any building permit issued prior to the effective date of such proposed amendment shall not be invalidated by the provisions thereof, provided that construction shall be commenced and completed within six months of the date of issuance of such building permit.