In cities having a population of more than 2,800,000, a legislative body shall not deny approval of a final subdivision map pursuant to Section 66474.61 if it, the advisory agency, or the appeal board has previously approved a tentative map for the proposed subdivision and if it finds that the final map is in substantial compliance with the previously approved tentative map and with the conditions to the approval thereof.
Source:
Section 66474.62, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=66474.62..