Boating while impaired is an offence under the Criminal Code of Canada. . The maximum sentence may vary depending on provincial statutes. In most provinces Alcohol may be consumed on board a pleasure craft only if it meets all of the following conditions: *the vessel has permanent sleeping facilities, *the vessel has permanent cooking facilities, *the vessel has a permanent toilet, and *the vessel is anchored or secured alongside a dock. Rules apply differently for commercial vessels. Each situation will be assessed by Transport Canada and a decision made as to how alcohol will be used or carried aboard.
Marijuana presents a whole new set of issues. The basics are the same for driving a vessel or a vehicle. But be aware that the THC deposits itself into your fatty cells. When a stressful event occurs it releases the THC and you may test as positive. The length of time is up to 28 days after the initial smoke. If crossing the US border, the security officers are federal employees. As it is illegal federally in the U.S. and you may be arrested an put in a Federal Institution.