(CNN) People in Canada are cheering, enduring long lines and honking their car horns in support as the country's first marijuana dispensaries open their doors Wednesday.

"I'm having a plaque made with the date and time and everything. This is never actually going to be smoked. I'm going to keep it forever," said Ian Power, who was among the first to buy marijuana in St. John's, a city in the country's easternmost province of Newfoundland and Labrador.

Like Power, hundreds are now legally buying recreational marijuana all over Canada, but not without adjusting to a few rules.

As marijuana enthusiasts continue celebrating this historic day for Canada, here's a quick primer to get you up to speed.

Who can buy marijuana in Canada?

Read More