121.— A reference in any statute to the laying of a document before a House shall be construed—

(a) if the rules and standing orders of the House which are for the time being in force specify the action to be taken as constituting laying of the document before the House, as a reference to the taking of that action, and

(b) if such rules and standing orders do not so specify, as a reference to the taking of such action as, by virtue of the practice which for the time being is followed by the House, is accepted as constituting laying of the document before the House.