Public improvement projects and services may be paid for by a combination of self-imposed property taxes, special assessments, or impact fees upon those properties that benefit from improvements and services. However, the district may not impose taxes, assessments, or fees for projects and services unless a written petition is filed with the board requesting such services. The petition must be signed by property owners representing a majority of property value or surface area in the district. In addition districts may be used as a financing mechanism to issue debt on a contract basis with an overlay tax increment reinvestment zone. This mechanism allows for the issuance of debt by a political subdivision of the state and it not city debt.