Md. Code, Business Occupations and Professions § 16–401

(a) Subject to the provisions of subsection (b) of this section, a licensed real estate appraiser shall keep, for 5 years from the date of delivery to the client, the original or a copy of:

(1) each contract the licensee enters into for the provision of real estate appraisal services;

(2) each appraisal report the licensee prepares or signs; and

(3) all supporting data that the licensee assembles or formulates to prepare an appraisal report.

(b) If, within the 5-year period for the retention of records, a licensed real estate appraiser is given notice that an appraisal or appraisal report is involved in litigation, a new 5-year period shall start on the date of the final disposition of the litigation.

(c) On request, a licensed real estate appraiser shall make any record required to be kept under this section available to the Commission to inspect or copy.