Notwithstanding any other provision of law, with respect to any special district formed during the 1978–79 fiscal year which initially was totally funded by other than the proceeds of taxes, and which subsequently, during the 1980–81 fiscal year, imposed a special tax with voter approval, the appropriations limit of such an entity, unless otherwise established pursuant to law, shall be deemed established by the electors at the election approving the special tax as that amount equal to the proceeds of taxes received during the first full fiscal year in which proceeds of taxes were received, and shall thereafter be adjusted in any manner which may be required or permitted by Article XIII B of the California Constitution.