FILE - In this April 23, 2017, file photo, vendors offer marijuana for sale at the High Times Cannabis Cup in San Bernardino, Calif. California is kicking off recreational marijuana sales on Jan. 1, 2018, but there will be plenty of confusion as the new market takes shape. Some places are banning sales, while only a small number appear ready to issue licenses. Los Angeles and San Francisco are among those still struggling to fashion local rules. Industry experts say there are also big gaps loom in the system intended to move cannabis from the field to distribution centers, then to testing labs and eventually retail shops. (AP Photo/Richard Vogel, File)