In ADESOLA V. ABIDOYE (1999) 14 NWLR (Pt. 637) 28 @ p. 56, where the Supreme Court per Karibi-Whyte J.S.C., “The construction of the word “may” in provisions of statutes has always raised difficulties. This is not because of the impression of the word … because the word “may” assumes a technical meaning depending upon the intendment of the statutory provision in which it is used. Although the etymological meaning of “may” is permissive and facultative and seldom can mean “must” and imperative it assumes this last-mentioned character; when there is anything in the provision that makes it the duty on the person on whom the power is conferred to exercise that power. When the exercise of the power is coupled with a duty on the person to whom it is given to exercise it, then it is imperative. In the instant case, there is a duty on the aggrieved who desires to set aside the decision of the prescribed authority to make his representation to the Commissioner for Chieftaincy Affairs within twenty-one days of the decision. The use of the expression ‘may’ in this situation is not merely facultative, but mandatory. There is no alternative.The aggrieved has no choice of action in the remedy provided for him….Accordingly, the word ‘may’ in Section 22(5) of the Chiefs Law of Oyo State, 1978 should be construed as imperative; the exercise of the right not being optional.”
THREE RULES OF STATUTORY INTERPRETATION
Specifically, there are three main rules of statutory interpretation: (a) the Literal Rule: where the words are plain and unambiguous, they must be given their natural and ordinary meaning, unless to do so would lead to absurdity. The plain words used by the legislature provide the best guide to their intention. See:Adewumi & Anor. Vs A.G. Ekiti State (2002) 2 NWLR (Pt.751) 474; A.G. Lagos State Vs Eko Hotels & Anor. (2006) 18 NWLR (Pt.1011) 378; Ojokolobo Vs Alamu (1987) 3 NWLR (Pt.61) 377; Sani Vs The President FRN & Anor (2020) LPELR – 50990 (SC) @ 22 – 23 D -A. (b) The Golden Rule: Where the use of the Literal Rule would lead to absurdity, repugnance or inconsistency with the rest of the statute, the ordinary sense of the words may be modified so as to avoid the absurdity or inconsistency, but no further. See: General Cotton Mill Ltd. Vs Travellers Palace Hotel (supra); Grey Vs Pearson (1857) 6 HLC 61 @ 106; PDP & Anor Vs INEC (1999) 7 SC (Pt. II) 30; Saraki Vs FRN (2016) 1 – 2 SC (Pt. V) 59. (c) The Mischief Rule: Formulated and laid down in Heydon’s Case 3 Co. Rep. 7a @ 7b as follows: (i) “What was the common law before the making of the Act? (ji) What was the mischief and defect for which the common law did not provide? (iii) What remedy the Parliament hath resolved and appointed to cure the disease of the commonwealth? and (iv) The true reason of the remedy; and then the office of all the judges is always to make such construction as shall suppress the mischief and advance the remedy …”
— K.M.O. Kekere-Ekun JSC. Umeano v. Anaekwe (SC.323/2008, Friday January 28 2022)