Undivided co-ownership (by indivision) has existed since time immemorial, even before the existence of divided co-ownership. Indivision allows two or more people to own a building while sharing acquisition and operating costs. A co-ownership is said to be undivided when the right of ownership is not accompanied by a material division of the property. The building usually has a single lot number. The owners own a share of this lot. The municipal and school tax bills are thus intended for all the co-owners of the building, who must separate the costs. In addition, since 1994, the Civil Code of Quebec has contained several rules governing joint ownership.