Canada

Canadian law bans possession and sale of drugs, including some that are legal in certain U.S. states.

Drug smuggling can bring large fines, a permanent ban from Canada, and jail.

Recreational cannabis is legal inside Canada, but carrying it across the border in either direction—in any amount or form, even with a medical document—is a serious criminal offence.

Arrest and prosecution; seizure and possible jail; a permanent ban is possible.

Recreational cannabis is legal in Canada for adults, and you may carry up to 30 grams of dried cannabis or the equivalent in public. The catch is that the minimum age is set by each province -- 18 in Alberta, 19 in most provinces and territories, and 21 in Quebec -- so an age that is legal in one province is an offence in the next. Never take cannabis across the Canadian border in either direction: that is a serious criminal offence regardless of the amount, of any medical document, and of whether it is legal where you are going.

Possessing more than 30 g in a public place: up to 5 years less a day on indictment, or a fine up to $5,000 or 6 months' imprisonment on summary conviction (Cannabis Act s. 8(2)). Importing or exporting cannabis without authorisation: up to 14 years (s. 11). Driving while impaired by cannabis is a criminal offence, and Quebec additionally prohibits driving with any detectable presence of cannabis in your saliva.

Confirm your medication is legal in Canada, carry it in original pharmacy-labeled packaging, and bring a copy of your prescription.

Improperly documented or prohibited medication may be refused or seized at the border.

Canada has strict gun laws; firearms and ammunition must be declared in writing at the border on a Non-Resident Firearm Declaration, and gun-related arrests at border crossings are common.

Undeclared firearms/weapons are seized permanently and not returned, and can lead to jail.

You must declare CAN$10,000 or more in cash or monetary instruments when entering or leaving Canada.

Undeclared currency at or above the threshold can be seized.

There are no legal restrictions on same-sex sexual relations or the organization of events in Canada.