Saraki v. FRN (2016) LPELR-40013(SC), the Supreme Court stated, “Where the doctrine of covering the field is in vogue in the Constitution any other legislation on the same field whether by the Federal/State government must bow to the dictate of the Constitution. That other law/legislation, if not repugnant must be supplemental or subsidiary to the constitutional provision.”
DOCTRINE OF COVERING THE FIELD IN RELATION TO THE CONSTITUTION AND A LEGISLATION
The “doctrine of covering the field” applies where there are inconsistencies in construction of statutes. One of the ways in which the doctrine will apply is when either the National Assembly or the House of Assembly of a State makes a law on a subject matter or item which the Constitution has adequately catered for thereby covering the field of that subject matter. In this situation, the law made by the Legislature, will to the extent of the inconsistency, be declared inconsistent and rendered null and void. See, A.G ABIA STATE v. A.G FEDERATION (2006) 16 NV LR (PT. 1005) 265 @ 371-372, INEC v. MUSA (2003) LPELR-24927 (SC).
— A.O. Obaseki-Adejumo, JCA. FRSC v Ehikaam (2023) – CA/AS/276/2019