Backers of a proposed ballot initiative to end marijuana prohibition in Arizona are launching a Phoenix Open-inspired billboard Monday to coincide with the kickoff of tournament events. It will be up through the end of the tournament on Sunday. An image of the billboard is attached and a high-resolution version can be downloaded online at http://bit.ly/1QxKULV . The Campaign to Regulate Marijuana Like Alcohol (CRMLA) will hold a news conference at 11 a.m. MST in front of the billboard on the southwest corner of 7th Street and Lincoln. The Waste Management Phoenix Open is the world's best-attended golf tournament, according to the Scottsdale Convention and Visitors Bureau, which refers to the Coors-sponsored event as the "greatest party on grass." The billboard features two adult marijuana consumers relaxing in a field and reads, "If beer and golf make for the 'greatest party on grass'... Why can't adults enjoy a safer party on grass?" "We're glad that Arizona residents have the opportunity to attend the Open, consume alcoholic beverages, and enjoy the 'greatest party on grass,'" said CRMLA chairman J.P. Holyoak. "We also think it's important to acknowledge that alcohol is a much more harmful substance than marijuana. "Alcohol is more toxic, more addictive, and more likely to contribute to rowdy or violent behavior," Holyoak said. "If spectators can enjoy a beer or cocktail at the TPC, adults should not be arrested for enjoying a little marijuana at a backyard picnic. It is, quite literally, a safer party on grass." The billboard directs viewers to Marijuana-vs-Alcohol.org , which details several ways in which marijuana is significantly less harmful than alcohol to the consumer and to society. The CRMLA is in the process of collecting signatures in support of a November ballot initiative that would make marijuana legal for adults 21 years of age and older in Arizona and establish a system in which it is regulated and taxed similarly to alcohol. "Our state took a shot at marijuana prohibition and landed in a hazard," Holyoak said. "We are giving Arizona a mulligan on its marijuana policy and letting voters take another swing at it this fall. For our part, we will continue to educate Arizonans about the relative harms of marijuana and alcohol as we tee up this initiative for November." WHAT: Campaign to Regulate Marijuana Like Alcohol news conference to launch Phoenix Open-themed billboard coinciding with the kickoff of the world's best-attended golf tournament WHEN: TODAY, Monday, February 1, 11 a.m. MST WHERE: In front of the billboard on the southwest corner of 7th Street and Lincoln, Phoenix WHO: J.P. Holyoak, campaign chairman Campaign staff # # # The Campaign to Regulate Marijuana Like Alcohol is supporting a 2016 statewide ballot initiative to end marijuana prohibition in Arizona and replace it with a system in which marijuana is regulated and taxed similarly to alcohol. For more information, visit http://www.RegulateMarijuanaAZ.org .