The rental is said to be short-term for any rental of less than 31 consecutive days. In this case, your activity can be considered as a commercial activity and you must follow certain rules. More information is available on the Revenu Québec website. In addition, you must verify that you respect your declaration of co-ownership as well as the zoning of the city before making short-term rentals.
In addition, I would like to remind you of article 1065 of the Civil Code of Quebec which reads as follows:
1065.A person who acquires a fraction, by whatever means, including the exercise of a hypothecary right, shall notify the syndicate within 15 days.
A co-owner who leases his private portion shall, within the same time, notify the syndicate. The co-owner shall give the name of the lessee, the term of the lease and the date on which he gave the lessee a copy of the by-laws of the immovable. The same applies, with the necessary modifications, where the private portion is otherwise occupied.
As a co-owner, even if you rent your condo, it is important that you keep an insurance policy covering your civil liability and your leasehold improvements. It is the responsibility of the co-owner to educate his tenants to insure himself for his movable property as well as his civil liability.