LOS ANGELES (AP) — When California voters legalized marijuana, they were promised that part of the tax revenue from pot sales and cultivation would be devoted to programs to teach youth how to avoid substance abuse. But more than a year after the start of sales, there's no money for those programs and questions are looming about how they might operate in the future. The absence of funding is "really sad and disappointing," said Robert Harris, a policy adviser and lobbyist for the California Society of Addiction Medicine. Equally troubling, he added, is the lack of clear guidelines for how that funding would be divvied up, and how programs would be run and evaluated. A report this week from the state Legislative Analyst's Office suggested that the Legislature might have to address gaps in the law, even pointing out that the term "youth" isn't defined. More needs to be done "so we don't roll it out and throw it away," Harris said. Proposition 64, which voters approved in November 2016 and legalized pot sales for adults 21 and over, included a section requiring a slice of the tax revenue go toward youth education to prevent "substance use disorders" and "harm from substance use.Read more on NewsOK.com