Any question of liability for non-repair of a highway in respect of damage resulting from an event which occurred before 3rd August 1964 shall be determined in accordance with the former rule of law (abrogated by section 1 of the M1Highways (Miscellaneous Provisions) Act 1961) which exempted the inhabitants at large and any other persons as their successors from liability for non-repair of highways; and section 58 of this Act does not apply in relation to any such damage.