California Code, Government Code - GOV § 66452.21

(a) The expiration date of any tentative or vesting tentative subdivision map or parcel map for which a tentative or vesting tentative map, as the case may be, has been approved that has not expired on the date that the act that added this section became effective and that will expire before January 1, 2011, shall be extended by 12 months.

(b) The extension provided by subdivision (a) shall be in addition to any extension of the expiration date provided for in Section 66452.6, 66452.11, 66452.13, or 66463.5.

(c) Any legislative, administrative, or other approval by any state agency that pertains to a development project included in a map that is extended pursuant to subdivision (a) shall be extended by 12 months if this approval has not expired on the date that the act that added this section became effective.  This extension shall be in addition to any extension provided for in Section 66452.13.

(d) For purposes of this section, the determination of whether a tentative subdivision map or parcel map expires before January 1, 2011, shall count only those extensions of time pursuant to subdivision (e) of Section 66452.6 or subdivision (c) of Section 66463.5 approved on or before the date that the act that added this section became effective and any additional time in connection with the filing of a final map pursuant to subdivision (a) of Section 66452.6 for a map that was recorded on or before the date that the act that added this section became effective.  The determination shall not include any development moratorium or litigation stay allowed or permitted by Section 66452.6 or 66463.5.