In some other legislatures, by contrast, a casting vote can only be exercised according to strict rules or conventions. For example, the Speaker of the British House of Commons (and analogous positions in most Westminster Parliaments) is expected by constitutional convention to follow Speaker Denison's rule, i.e. to vote to allow further discussion, if this is possible, and otherwise to vote in favour of the "status quo" (in effect meaning "Yes/Yea/Aye" for the first and second readings, and "No/Nay" on the third).