Constitution Act, 1867 — Part VIII: Revenues… (1867)
“ The population of a province shall be ascertained from time to time in the case of the provinces of Manitoba, Saskatchewan, and Alberta respectively by the last quinquennial census or statutory estimate of population made under the Acts establishing those provinces or any other Act of the Parliament of Canada making provision for the purpose, and in the case of any other province by the last decennial census for the time being. ”
