61-2-104. Funds. The governor and the department may enter into contracts with the federal government to secure maximum federal appropriation. At least 40% of all federal funds received by the state shall be spent by the political subdivisions of the state in carrying out local approved highway traffic safety programs. Except as provided in this part, the governor may accept all gifts, money, and funds to implement the purposes of this part. The expenditure of funds, exclusive of the federal appropriation, shall be maintained at a level which shall not fall below the average level of the expenditures for the last 2 full fiscal years preceding July 1, 1966, as determined by the expenditures of state and political subdivisions.