4.—(1)
(2) As from the date when the subsidiary to which it relates comes into public ownership a holding company's pension scheme shall have effect as if references therein to the holding company were references to the Corporation.
(3) The provisions of regulation 3 hereof shall apply to a holding company's pension scheme as if references in those provisions to a publicly-owned company's pension scheme were references to a holding company's pension scheme.
(4) No amendment made by the provisions of this regulation shall affect any liability of the holding company which has accrued before the date when paragraph (2) hereof comes into operation and any such liability may be enforced as if such provision had not been made.