It could ruin plans to have a portion of the ticket price deductible. One solution may be to make the draw free, not conditional on purchasing admission. Ask for copies of Interpretation Bulletin IT 297R and IT 110R2. Many provinces and municipalities also have laws affecting non-profit organizations. Be sure to check with local authorities before launching a special event.
Regulations vary from one community to the next.
Neighbouring communities may have regulations that contradict each other. Be especially careful if you are planning an event that crosses several jurisdictions. Some groups have also taken out insurance to compensate the charity if the event has to be cancelled because of bad weather, or the failure of the entertainment to appear. This can be expensive, but may be worthwhile if the event itself is costly. The charity charges people to participate in the golf tournament.