Notwithstanding anything contained in this Act,—
(a) any suit for which the period of limitation is shorter than the period of limitation prescribed by the Indian Limitation Act, 1908 (9 of 1908), may be instituted within a period of seven years next after the commencement of this Act or within the period prescribed for such suit by the Indian Limitation Act, 1908, whichever period expires earlier:
Provided that if in respect of any such suit the said period of seven years expires earlier than the period of limitation prescribed therefor under the Indian Limitation Act, 1908 (9 of 1908) and the said period of seven years together with so much of the period of limitation in respect of such suit under the Indian Limitation Act, 1908, as has already expired before the commencement of this Act is shorter than the period prescribed for such suit under this Act, then, the suit may be instituted within the period of limitation prescribed therefor under this Act;
(b) any appeal or application for which the period of limitation is shorter than the period of limitation prescribed by the Indian Limitation Act, 1908 (9 of 1908), may be preferred or made within a period of ninety days next after the commencement of this Act or within the period prescribed for such appeal or application by the Indian Limitation Act, 1908, whichever period expires earlier.
Legal Commentary & Landmark Judgments: Section 30
Section 30 of the Limitation Act, 1963 provided a temporary transitional window for suits and appeals for which the period of limitation prescribed by the 1963 Act was shorter than the period prescribed by the 1908 Act.
Section 30 is of historical and jurisprudential relevance, illustrating the constitutional principle that the legislature cannot extinguish an accrued cause of action without providing a reasonable transitional window to sue.