No. Not only do you not have to live here, there is not any registration system.
Colorado law states that both tourist and residents can buy 28 grams in a single transaction.
Yes. As long as the total equals 28 grams or less.
No. Even though it is legal to consume marijuana you can get a ticket for doing it openly and publicly.
Yes. Marijuana may be carried in cars but it may not be in an open container and cannot cross state boundaries. It is illegal to use or consume marijuana in a motor vehicle and it is illegal to drive under the influence of marijuana.
No. On-site consumption is prohibited at marijuana shops. You have to take your leaves (or buds) and leave.
No. Not only is it illegal to take it out of state, marijuana possession is banned at Denver International Airport.
Yes, you may give up to one ounce of marijuana to an adult friend (21+), BUT you must receive NOTHING in return. No donations, delivery fees, services, money, or hugs. Nothing.