judge whether, on that account, the State legislature loses its competence to pass the Act of 1973, it is necessary to have regard to the object and purpose of that Act and to the relevant provisions thereof, under which Special Area Development Authorities are given the power to tax lands and buildings within their jurisdiction. We have set out the objects of the Act at the commencement of this judgment. one of which is to provide for the development and administration of Special Areas through Special Area Development Authorities, Section 64 of the Act of 1973, which provides for the constitution of the special areas, lays down by sub-section (4) that : Notwithstanding anything contained in the Madhya Pradesh Municipal Corporation Act, 1956, the Madhya Pradesh Municipalities Act, 1961, or the Madhya Pradesh Panchaya ts Act, 1962, the Municipal Corporation, Municipal ·Council, Notified Area Committee or a Panchayat, as the case may be, shall, in relation to the special area and as from the date the Special Area Development Authority undertakes the functions under clause (v) or clause (vi) of section 68 cease to exercise the powers and perform the function and duties which the Special Area Development Authority is competent to exercise and perform under the Act of 1973. Section 68 defines the functions of the Special Area Development Authority, one of which, as prescribed by clause (v), is to provide the mun)cipal services as specified in sections 123 and 124 of the Madhya Pradesh Municipalities Act, 1961. Section 69, which defines the powers of the Authority, shows that those powers are· conferred, inter alia, for the purpose of municipal administration. Surely; the functions, powers and duties of Municipalities do not become an occupied field by reason of .the declaration contained in section 2 of the Mines and Minerals (Development and Regulation) Act, 1957 . .Though, therefore, on account of that decldration, the legislative :field covered by Entry 23, List II may pass on to the Parliament by virtue of Entry 54, List I, the competence of the State Government to enact laws for municipal administration will remain unaffected by that declaration.