[gohrt]

http://mpdc.dc.gov/marijuana

As a result, it is legal for a person who is at least 21 years old to:

Possess two ounces or less of marijuana; Transfer one ounce or less of marijuana to another person who is at least 21 years old, so long as there is no payment made or any other type of exchange of goods or services;

A person can still be arrested for:

Selling any amount of marijuana to another person; Possessing more than two ounces of marijuana;