Section 20 - Effective date and legislative intent(a) In general. This act shall take effect immediately.(b) Exceptions; legislative intent. As it is the intent of the General Assembly that the language added to sections 908 , 2510, the second, fourth and fifth sentences ofsection 3102 , section 3351 , paragraph (6) ofsection 5153 , the first sentence ofsection 5154 , paragraph (31) the second sentence of subsection (g) ofsection 5305 , paragraph (31) ofsection 5521 , section 5533.1 , subsection (b) ofsection 6103 , subsection (d) ofsection 6111 , and paragraph (21.1) ofsection 7133 , should have been enacted in the Probate, Estates and Fiduciaries Code, said inclusions shall be retroactive to July 1, 1972, the effective date of said code.Approved the 10th day of Dec. A.D.1974.