California Code, Civil Code - CIV § 1689.14

(a) Any home solicitation contract or offer for the repair or restoration of residential premises signed by the buyer on or after the date on which a disaster causes damage to the residential premises, but not later than midnight of the seventh business day after this date, shall be void, unless the buyer or his or her agent or insurance representative solicited the contract or offer at the appropriate trade premises of the seller. Any contract covered by this subdivision shall not be void if solicited by the buyer or his or her agent or insurance representative regardless of where the contract is made. For purposes of this section, buyer solicitation includes a telephone call from the buyer to the appropriate trade premises of the seller whether or not the call is in response to a prior home solicitation.

(b) As used in this section and Section 1689.6, “disaster” means an earthquake, flood, fire, hurricane, riot, storm, tidal wave, or other similar sudden or catastrophic occurrence for which a state of emergency has been declared by the President of the United States or the Governor or for which a local emergency has been declared by the executive officer or governing body of any city, county, or city and county.