The requirements under this article shall apply to all subdivisions laid out after the effective date of this article; provided such requirements shall not apply to any subdivision for which tentative approval of the preliminary map and approval of the construction plans have been granted, and the performance of the work under such construction plans has been secured by bond or in the alternative for a subdivision involving five lots or less, the work under such construction plans has started, on or before the effective date of this article, and that approval of final map of such subdivision is subsequently granted in accordance with the subdivision rules and regulations.
(Sec. 22-5.5, R.O. 1978 (1983 Ed.)) (1990 Code, Ch. 22, Art. 5, § 22-5.5)