Plenty of ink has been spilled at StarMetro Calgary Weed Delivery over what cannabis legalization will mean for residents of this city after midnight Oct. 17. The provincial government, city council, and the Alberta Gaming and Liquor Commission have all outlined the new rules. Plenty of cannabis companies are also doing their best to educate the public about weed’s properties and uses.

But Calgarians no doubt have more basic questions. Where will I be able to smoke weed? How will I be able to buy cannabis online — and how can I do so without my 12-year-old getting their hands on it? How do I roll a joint?

We won’t be answering that last one. What we can do is offer you a primer — a guide to weed in Calgary and the new rules — so you’ll be able to enjoy a little legal weed Wednesday without any trouble.

Marijuana, which can also be called weed, pot, dope, or cannabis, is the dried flowers and leaves of the cannabis plant. It contains mind-altering (e.g., psychoactive) compounds like tetrahydrocannabinol, or THC, as well as other active compounds like cannabidiol, or CBD, that are not mind-altering.

THC, or tetrahydrocannabinol, is the chemical responsible for most of marijuana’s psychological effects. It acts much like the cannabinoid chemicals made naturally by the body, according to the National Institute on Drug Abuse (NIDA).