Synopsis As Introduced Creates the Development Impact Fee Authorization for Local Governments Act. Authorizes municipalities and counties to adopt ordinances to impose, on behalf of themselves or other local governments, development impact fees on new developments in the municipality or county. Sets forth requirements and procedures for adopting the fee ordinances, for the imposition, collection, and expenditure of the fees, for returning unexpended fees, and for appealing the imposition of the fees. Requires that, within 2 years after the effective date of this Act, all municipalities and counties must conform any existing impact fee ordinance with the provisions required under this Act. Effective immediately.