(1)Where by virtue of any enactment passed or made before the passing of this Act a claim to establish a right or enforce implement of an obligation may be made only within a period of limitation specified in or determined under the enactment, and, by the expiration of a prescriptive period determined under section 6, 7 or 8 of this Act the right or obligation would, apart from this subsection, be extinguished before the expiration of the period of limitation, the said section shall have effect as if the relevant prescriptive period were extended so that it expires—
(a)on the date when the period of limitation expires, or
(b)if on that date any such claim made within that period has not been finally disposed of, on the date when the claim is so disposed of.
(2)Nothing in section 6, 7 or 8 of this Act shall be construed so as to exempt any deed from challenge at any time on the ground that it is invalidex facieor was forged.