The legislative body of any county, city, or village or the electors of any township or school district in which a forestry commission has been appointed may appropriate money to be used by the forestry commission to carry out the purposes of this part. However, if the legislative body desires to spend an amount in excess of 1/10 mill per dollar assessed valuation or in excess of $5,000.00, or both, in any 1 year for the purposes of this part, the sum shall not be appropriated unless the electors of the county, city, or village agree to the expenditure at any general or special election by a 3/5 vote.