Where an instrument of dissolution of a registered society or branch consented to as described in section 93(1)(b) of the 1974 Act as it has effect before 1st February 1993 is received by the registrar before 1st September 1993 it shall be treated for all purposes as a valid instrument of dissolution notwithstanding the amendment of section 93(1)(b) of the 1974 Act by the 1992 Act.