(a) Any local governmental officer or employee who has not filed a disclosure of substantial interests shall, before acting upon any matter which will affect any business in which the officer or employee has a substantial interest, file a written report of the nature of the interest with the county election officer of the county in which is located all or the largest geographical part of the officer's or employee's governmental subdivision.
(b) A local governmental officer or employee does not pass or act upon any matter if the officer or employee abstains from any action in regard to the matter.