Each county collector, except in counties of the first class with a charter form of government, upon certification by the association of county collectors of attendance at a training program required by the provisions of section 67.130, shall receive annual compensation of four thousand dollars for the year 1985, and a proportionate part of four thousand dollars for that part of the year 1984 when this section is in effect, for the added duty of attending the training program required by the provisions of section 67.130. This additional compensation shall be paid in the same manner and at the same times as his other compensation is paid.