Indiana Code Title 9. Motor Vehicles § 9-27-1-5

Sec. 5. If the expenditure of public funds of a political subdivision is required as a condition for the provision of funds under the federal act, the acceptance of funds under the federal act by the political subdivision shall be made by the governing authority of the political subdivision, with the consent of the appropriating authority of the political subdivision.  Funds of a political subdivision may not be expended without due appropriation as provided by law.  However, a political subdivision may make regular appropriations for the purposes authorized by this chapter or may make regular appropriations in the same manner that emergency appropriations are made.