As is their standard permitting procedure, the Bureau of Land Management (BLM), who provides the permit for Black Rock LLC to hold the annual Burning Man Event in the Black Rock Desert, sets out a series of permit stipulations. One of those states: "The permittee shall post a copy of the Special Recreation Permit (Form 2930-1) ... on the Burning Man website...." Furthermore, another stipulation states, in part: "BRC shall implement a controlled substance and alcohol use policy. This policy will be posted and maintained on all public information boards and relayed to participants through other available means."
On July 23, 2012 the Bureau of Land Management issued a 4-year permit for the Burning Man event. Below are the relevant documents that BRC is making available publicly.