Once a county-appraisal firm agreement and, where applicable, a commercial loan agreement, is approved by the State Revenue Commissioner, no alterations, deletions or additions, either oral or in writing, in, of or to the provisions thereof will be made without the prior written approval of the State Revenue Commissioner.
Ga. Comp. R. & Regs. R. 560-11-2-.14
Ga. L. 1937-38, Extra Sess., pp. 77, et seq., as amended; Ga. Code Ann., Secs. 92-8405, 8406, 8409, 8427).