Futuris Forman Imponere Debet, Non Praeteritis" indicating that a new law ought to regulate what is to follow and not the past, carries with it a presumption of prospectivity and this presumption is generally said to operate unless the contrary is shown by an express provision in the statute or if the retrospectivity is otherwise discernible through necessary implication. This is because such statutes would have the consequence of affecting vested rights, impose new burdens or impair existing obligations. However, when a decision rendering an opinion as regards the interpretation of a penal provision is subsequently overruled by the decision of a larger bench, the consequence of the overruling is starkly different and by default, retrospective. This is because it is settled law that the law declared by this Court is retrospective and is normally assumed to be the law from the inception . 92. The operation of a newly enacted statute or rule must not be confused with the effect of a judgment. A judgment or decision which interprets a statute or provision thereof declares the meaning of the statute as it should be construed from the date of its enactment. In other words, the judgment declares what the legislature had said at the time when the law was promulgated and therefore, it has retrospective effect. On the contrary, it is the statute or the rule which is presumed to be prospective unless expressly made retrospective. What follows from the same, is that a decision or judgment enunciating a principle of law is applicable to all cases irrespective of the stage of pendency before different forums since what has been enunciated is the meaning of the law which existed from the inception of the concerned statute or provision. What has been declared to be the law of the land must be held to have always been the law of the land. This conclusion also stems from the rationale that the duty of the court is not to "pronounce a new law but to maintain and
