California Code, Health and Safety Code - HSC § 33489

(a) Except as provided in subdivision (b), this article shall be exclusive authority for merger of redevelopment project areas on and after January 1, 1981. However, project areas merged prior to January 1, 1981, pursuant to other provisions of this chapter shall continue to be governed by such provisions.

(b) If Assembly Bill No. 3300 of the 1979-80 Regular Session [Stats.1980, c. 512] is chaptered and becomes effective and adds Article 14.5 (commencing with Section 33478) to this chapter relating to the merger of project areas within the City of Richmond, any such project merger within the City of Richmond may be conducted either under this article or alternatively pursuant to the provisions of Article 14.5 (commencing with Section 33478).