A.
At the time of the enactment of this chapter, all actual uses, lots and structures in effect in a lawful manner shall remain in effect as is currently pending in respect to same.
B.
Any building for which a building permit has been issued prior to the enactment or amendment of this chapter and erection of which is in conformity with the plans submitted prior to the enactment shall be commenced within 90 days after the effective date of such enactment or amendment. If such building does not conform to the provisions of this chapter, it shall be a nonconforming use.
C.
Furthermore, it shall be the intent of this chapter to provide for the regulation of such existing uses, lots and structures by specifying the circumstances and conditions under which they may continue to exist, as specified in this article.