(a) Any transaction completed before October 31, 1997, or any transaction that is subject to a pending definitive agreement as of October 31, 1997, and which is either conditioned only upon receipt of regulatory approval, or is subject to a pending judicial proceeding as of April 1, 1997, is not subject to the requirements of this article.

(b) Any lease which is exempted from the operation of this article pursuant to subsection (a) of this Code section and which contained, on October 31, 1997, an option to renew that lease upon its expiration shall not be subject to this article upon any renewal on or after April 28, 1999.