British North America Act, 1867, S. 26
26. If at any Time on the Recommendation of the Governor General the Queen thinks fit to direct that Three or Six Members be added to the Senate, the Governor General may by Summons to Three or Six qualified Persons (as the Case may be), representing equally the Three Divisions of Canada, add to the Senate accordingly.
Documents related to section 26
[Note: The number of members who may be added to the Senate was increased from three or six to four or eight, representing equally the four divisions of Canada. See the Constitution Act, 1915 (No. 23 infra).]