The board shall transfer to this pension fund all taxes collected by the board returned as taxes due on premiums charged by fire insurance companies for property coverage in areas in which the public fire suppression facilities of the fire department are ratable as a class nine rating under standards set forth in the Fire Suppression Rating Schedule, Section I, Public Fire Suppression, Edition 6-80, Copyright 1980, published by the Insurance Services Office, a rating organization licensed by the Commissioner of Insurance, which schedule is maintained on file with the Commissioner of Insurance as required by general law and which has not been disapproved by the Commissioner, or a rating which the board by regulation determines is substantially equivalent under rating standards published by an organization licensed by the Commissioner of Insurance performing similar rating functions, which standards are maintained on file with the Commissioner of Insurance and which have not been disapproved by the Commissioner of Insurance, as provided in Code Section 47-7-61.