But if I understand, for instance, if in the House of Commons one party or another tables a motion to amend the Standing Orders to create some kind of framework through the Standing Orders on prorogation, and it is adopted by a majority vote, it would not equal a convention, because it was not supported by all parties in the House.
Evidence of meeting #21 for Procedure and House Affairs in the 40th Parliament, 3rd session. (The original version is on Parliament’s site, as are the minutes.) The winning word was convention.
A recording is available from Parliament.