The provisions of any municipal charter or of any general statute or special act to the contrary notwithstanding, an ordinance establishing a special services district may provide: (a) That the municipality in which such district is located is excused from providing within such district, or within some or all of the subdistricts, if any, within such district, some or all of the services which such district is authorized to provide pursuant to subsection (g) of section 7-339n, provided such ordinance shall also provide that thenceforth it shall be the obligation of such district to provide such services as to which the municipality has been excused; (b) that the municipality within which such district is located may enter into a contract with such district in which the city is excused from providing within such district, or within some or all of the subdistricts, if any, within such district, some or all of the services which such district is authorized to provide pursuant to subsection (g) of section 7-339n, and in which such district agrees to provide all such services as to which the municipality has been excused; (c) that, if such ordinance contains a provision excusing the municipality from the performance of any services pursuant to subsection (a) of this section, the municipality shall make an annual grant to such district, in a fixed amount or based upon a formula set forth in such ordinance, for the purpose of compensating such district for the services from which the municipality is excused and for which such district is to become responsible; (d) that, if such ordinance contains a provision authorizing the municipality and such district to enter into a contract pursuant to subsection (b) of this section excusing the municipality from the performance of certain services and obligating such district to provide such services, the municipality may also agree, in such contract, to make an annual grant to such district, in a fixed amount or based upon a formula set forth in such contract, for the purpose of compensating such district for the services from which the municipality is excused and for which such district is to become responsible; (e) that, as to any services which the municipality is excused from performing and which such district is to become responsible for performing, whether by the terms of such ordinance itself or by the terms of a contract entered into pursuant to authority granted in such ordinance, the municipality and such district may enter into a contract or contracts having a fixed term or extending for the life of such district in which such district is given the right to elect to purchase, at intervals stated in such contract and for periods of time stated in such contract, from the municipality, some or all of such services either at prices fixed in such contract or at prices to be determined in accordance with a formula set forth in such contract, or at prices determined by a combination of these methods; (f) that all or certain of the interests in real property held by such district are not subject to the municipal property tax; (g) that all or certain of the personal property owned by such district is not subject to the municipal property tax; and (h) that interests in real property held by such district, and personal property owned by such district, are subject to the municipal property tax but that any such tax may be abated prospectively by the legislative body of the municipality.