Samuel Osigwe v. PSPLS Management Consortium Ltd & Ors. (2009) 3 NWLR 378 SC: “Breach of a rule of practice and procedure does not render the proceedings a nullity but merely an irregularity.”
ONCE A STATUTE PRESCRIBES A METHOD, OTHER METHODS ARE EXCLUDED
It is trite that once the law has prescribed a particular method of exercising a statutory power, any other method of exercise of it is excluded: so there can be no question of the lessor in this case recovering possession by resorting to a right of re-entry or any other type of self-help. I agree with Chief Umeadi that although section 28(1) of the Law states that the lessor “may enter a suit”, “may” should be construed as mandatory i.e. as meaning “shall” or “must”.
– Nnaemeka-agu, JSC. Ude v. Nwara (1993)