4Capacity to sit in House of Commons.
Neither the Minister, nor any parliamentary secretary appointed by the Minister shall, by reason of his office as such, be incapable of being elected as a member of the Commons House of Parliament, or of sitting or voting as such a member:
Provided that during any period during which the Minister is a member of that House not more than one such parliamentary secretary shall sit as a member thereof, and, during any other period, not more than two such parliamentary secretaries shall sit as members thereof.