Promulgation is the declaration of the Law. This means that we try to spread the Law, and give information about it, but do not argue, convert, or proselytize. People can take it or leave it as they Will. To the end of aiding the promulgation of the Law, the Thelemic Union offers several printable posters. You are free to print and post these around and use them as you Will.
Learn more about promulgation in these posts: Promulgation of the Law of Thelema | Modern Promulgation Strategies for Spreading Thelema