Notwithstanding Section 17 of Chapter 1330 of the Statutes of 1976, as amended by Section 29 of Chapter 1331 of the Statutes of 1976, any map dated September 12, 1979, and filed on September 14, 1979, with the office of the Secretary of State, or any provision of Section 30170, the inland boundary of the coastal zone in a portion of San Diego County, of approximately 95 acres in Penasquitos Canyon, is hereby amended as indicated by revised map number 33, dated March 21, 1980, and filed on March 21, 1980, with the office of the Secretary of State; provided, that the City of San Diego first submits and the commission approves a drainage plan for the area providing for drainage in connection with the extension of Mira Mesa Boulevard to Interstate Highway 805 sufficient to assure that no detrimental increase in runoff of water into Carroll Canyon occurs as a result of construction of Mira Mesa Boulevard.

(Added by Stats. 1980, Ch. 631, Sec. 1.)