In all districts other than R1, R2, R3, R4 or R5 Districts, if, before April 30, 2008, a building permit has been lawfully issued authorizing construction on a zoning lot, the provisions of N080078 ZRY, pertaining to yards and N080081 ZRY, pertaining to street trees, shall not apply, provided that foundations have been completed in accordance with paragraphs (a) and (b) of Section 11-331 (Right to construct if foundations completed), as applicable, before April 30, 2009. The provisions of Section 11-332 (Extension of period to complete construction) shall not apply.