The date of commencement of the Decree, as stated in the marginal note in it, was 20th June, 1991. The date of commencement of a statute is the date that it comes into operation. In the circumstance, the date on which the Decree itself, which included section 11 thereof, came into operation was the 20th June, 1991. There was nothing in the Decree to the effect that the Decree or any part or section thereof shall be deemed to have come into operation on a date earlier than the date of commencement stated in the Decree. Also, there was no provision in the Decree that actions or proceedings on matters to which the provision of section 11 of the Decree applied, which were pending in courts on the date of commencement of the decree, should abate or be discontinued. If it is intended by the lawmaker that any part or section of a statute should come into operation on a date earlier than the date of commencement of the statute itself provision to that effect will be made in clear term.
— Y.O. Adio. Kotoye v. Saraki (1994) – S.C. 147/1993