California Code, Government Code - GOV § 65098.6

(a) Two-to-one replacement of any demolished housing unit that was occupied within the last 10 years, unless the housing unit was declared substandard by a building official, pursuant to Section 17920.3 of the Health and Safety Code, prior to purchase by the developer.  For each housing unit demolished, regardless of market value of the unit, two units of affordable housing for persons and families of low or moderate income, as defined in Section 50093 of the Health and Safety Code, that are deed-restricted shall be built within the jurisdiction.  Funds from any fee imposed for the replacement of demolished housing units shall be placed in a housing-specific set-aside account and shall be used for housing within three years of collection.

(b) If residential dwellings are affected through purchase, the developer shall be required to provide any displaced tenant with an amount equivalent to 12 months' rent at the current rate.

(c) Nothing in this section shall be construed to limit or preclude the applicability of Article 2 (commencing with Section 66300.5) of Chapter 12 to logistics uses.  A logistics use that is subject to Article 2 (commencing with Section 66300.5) of Chapter 12 shall first comply with that article.  Any additional replacement housing obligations or payments to displaced tenants that are not required pursuant to that article shall comply with this section.