(b) In addition to any provision in the Real Estate Appraisers’ Licensing and Certification Law (Part 3 (commencing with Section 11300) of Division 4 of the Business and Professions Code), a contractor shall maintain the confidentiality of assessee information and records as provided in Sections 408, 451, and 481 that is obtained in performance of the contract.

1. (1) A request for information and records from an assessee shall be made by the assessor. The assessor may authorize a contractor to request additional information or records, if needed. However, a contractor shall not request that information or records without the written authorization of the assessor.
2. (2) A contractor shall not provide appraisal data in his or her possession to the assessor or a contractor of another county who is not a party to the contract. An assessor may provide that data to the assessor of another county as provided in subdivision (b) of Section 408.

(c) A contractor may not retain information contained in, or derived from, an assessee’s confidential information and records after the conclusion, termination, or nonrenewal of the contract. Within 90 days of the conclusion, termination, or nonrenewal of the contract, the contractor shall:

1. (1) Purge and return to the assessor any assessee records, whether originals, copies, or electronically stored, provided by the assessor or otherwise obtained from the assessee.
2. (2) Provide a written declaration to the assessor that the contractor has complied with this subdivision.