(7) The scheme shall thereafter be placed before the Central Government for its sanction and the Centraly Government may sanction the scheme without any modifications or with such modifications as it may consider necessary; and the scheme as sanctioned by the Central Government may specify in this behalf: Provided . . . . . . . . (7A) The sanction accorded by the Central Government under sub section (7), whether before or after the commencement of section 21 of the Banking Laws (Miscellaneous Provisions) Act, 1963, shall be conclusive evidence that all the requirements of this section relating to reconstruction, or, as the case may be, amalgamation have been com plied with and a copy of the sanctioned scheme certified in writing by an officer of the Central Government to be a true copy thereof, shall, in all legal proceedings (whether in appeal or otherwise and whether instituted before or after the commencement of the said section 21), be admitted as evidence to the same extent as the original scheme.