An assessment, based upon all related costs, as determined by borough staff, shall be assessed by the assembly on all property within a service area. The assembly may levy taxes by ordinance, make assessments, receive state funds, and otherwise generate income to pay the costs of services provided. All sales tax ordinances shall be subject to ratification of the electorate within the area in which the tax will be in effect. Obligations made or contracts awarded by the service area shall conform to Chapter 3.60 HBC. (Ord. 17-07-470 § 4)