38 S.E.2d 774 THOMPSON, State Revenue Commissioner, v. ATLANTIC COAST LINE RAILROAD COMPANY. 15480.Supreme Court of Georgia. JUNE 6, 1946. 1. Where a perpetual corporate charter granted by the legislature confers tax exemptions upon the corporation, the exemption is irrevocable. Accordingly, article 1, section 3, paragraph 3 of the Constitution of 1945 (Ga. L. 1945, […]