5. 66[(1) Where any Act of Parliament is not expressed to come into operation on any particular day, then it shall come into operation,(a) in the case of an Act of Parliament to which this Act was applicable before the 26th day of March, 1971, on the date on which it receives the assent; and

(b) in the case of any other Act of Parliament, the day on which the assent is first published in the official Gazette;]

(2) 67[Omitted by the Central Laws Order, 1961, Article 2 and Schedule.]

(3) Unless the contrary is expressed, [an Act of Parliament] or Regulation shall be construed as coming into operation immediately on the expiration of the day preceding its commencement.

5A. [Omitted by the Schedule of the Pakistan (Adaptation of Existing Pakistan Laws) Order, 1947 (Governor General's Order 20 of 1947).]

6. Where this Act, or any 68[Act of Parliament] or Regulation made after the commencement of this Act, repeals any enactment hitherto made or hereafter to be made, then, unless a different intention appears, the repeal shall not-

(a) revive anything not in force or existing at the time at which the repeal takes effect; or

(b) affect the previous operation of any enactment so repealed or anything duly done or suffered thereunder; or

(c) affect any right, privilege, obligation or liability acquired, accrued or incurred under any enactment so repealed; or

(d) after any penalty, forfeiture or punishment incurred in respect of any offence committed against any enactment so repealed; or

(e) affect any investigation, legal proceeding or remedy in respect of any such right, privilege, obligation, liability, penalty, forfeiture or punishment as aforesaid;

and any such investigation, legal proceeding or remedy may be instituted, continued or enforced, and any such penalty, forfeiture or punishment may be imposed as if the repealing Act or Regulation had not been passed.

6A. Where any 69[Act of Parliament] or Regulation made after the commencement of this Act repeals any enactment by which the text of any 70[Act of Parliament] or Regulation was amended by the express omission, insertion or substitution of any matter, then, unless a different intention appears, the repeal shall not affect the continuance of any such amendment made by the enactment so repealed and inoperation at the time of such repeal.

7.(1) In any 71[Act of Parliament] or Regulation made after the commencement of this Act, it shall be necessary, for the purpose of reviving, either wholly or partially, any enactment wholly or partially repealed, expressly to state that purpose.

(2) This section applies also to all 72[Acts of Parliament] made after the third day of January, 1868, and to all Regulations made on or after the fourteenth day of January, 1887.

8. (1) Where this Act, or any 73[Act of Parliament] or Regulation made after the commencement of this Act, repeals and re-enacts, with or without modification, any provision of a former enactment, then references in any other enactment or in any instrument to the provision so repealed shall, unless a different intention appears, be construed as references to the provision so re-enacted.

(2) [Omitted by Article 9 of the General Clauses (Amendment) Order, 1972 (President's Order No. 147 of 1972).]

9. (1) In any 74[Act of Parliament] or Regulation made after the commencement of this Act, it shall be sufficient, for the purpose of excluding the first in a series of days or any other period of time, to use the word "from", and, for the purpose of including the last in a series of days or any other period of time, to use the word "to".

(2) This section applies also to all 75[Acts of Parliament] made after the third day of January, 1868, and to all Regulations made on or after the fourteenth day of January, 1887.

10. (1) Where, by any 76[Act of Parliament] or Regulation made after the commencement of this Act, any act or proceeding is directed or allowed to be done or taken in any Court or office on a certain day or within a prescribed period, then, if the Court or office is closed on that day or the last day of the prescribed period, the act or proceeding shall be considered as done or taken in due time if it is done or taken on the next day afterwards on which the Court or office is open:

Provided that nothing in this section shall apply to any act or proceeding to which the 77[* * *] Limitation Act, 1877, applies.

(2) This section applies also to all 78[Acts of Parliament] and Regulations made on or after the fourteenth day of January, 1887.

11. In the measurement of any distance, for the purposes of any 79[Act of Parliament] or Regulation made after the commencement of this Act, that distance shall, unless a different intention appears, be measured in a straight line on a horizontal plane.

12. Where, by any enactment now in force or hereafter to be in force, any duty of customs or excise, or in the nature thereof, is leviable on any given quantity, by weight, measure or value of any goods or merchandize, then a like duty is leviable according to the same rate on any greater or less quantity.

13. In all 80[Acts of Parliament] and Regulations, unless there is anything repugnant in the subject or context,-

(1) words importing the masculine gender shall be taken to include females; and

(2) words in the singular shall include the plural, and vice versa.

13A. [Omitted by the Central Laws Order, 1961, Article 2 and Schedule.]