(a) A legal challenge to the council’s adoption or amendment of the Delta Plan or its appeals procedures adopted pursuant to Section 85225.30 shall be brought pursuant to Section 1085 of the Code of Civil Procedure within 90 days of the date of the council’s final decision.
(b) A legal challenge to the council’s determination of an appeal decided pursuant to Chapter 3 (commencing with Section 85225) of Part 3 shall be brought pursuant to Section 1094.5 of the Code of Civil Procedure within 90 days of the date the council adopts its written findings pursuant to Section 85225.25.