§ 99. Municipal services. In connection with projects located within its respective territorial boundaries, a municipality, a school district, a fire alarm district, a fire district, a fire protection district, or an improvement district may, upon such terms, with or without consideration, as the local legislative body of such municipality or the governing body of such district may deem advisable, render or contract to render services to an authority, housing company or a government, or provide and maintain parks, sewerage, or other facilities adjacent to or in connection with a project. A municipality or a district hereinabove described may also render or contract to render such services and to provide such facilities in connection with projects located outside its respective territorial boundaries upon such terms and consideration as shall, in the determination of the local legislative body of such municipality or the governing body of such district, which determination shall be conclusive, compensate such municipality or district for the cost of furnishing such services and facilities. A municipality may enter into an agreement with an authority, housing company or a government, upon such terms as it shall determine, with or without compensation, to open, pave, install, close or change the grade of streets, roads, roadways, alleys, sidewalks, or other places, to change the municipal map, to plan, replan, zone or rezone any section of the municipality. In connection with the exercise of this power a municipality may, if it deems advisable, incur the entire expense of any such public improvements located within its territorial boundaries without assessment against abutting property owners, or contract with an authority upon such terms, with or without consideration, as it may deem advisable, with respect to the exercise by the municipality or government of its powers relating to the repair, closing or demolition of unsafe, insanitary, or unfit dwellings, and with respect to aid and cooperation by the municipality or government in the planning, undertaking, construction or operation of projects.