The current regulations of marijuana across the United States cause significant confusion among many citizens. The differences between possession, cultivation, sale, distribution, intent to distribute and trafficking are vague and vary widely by state. This creates a high level of uncertainty of the risks associated with transactions between buyers, sellers and users of marijuana and law enforcement officers - especially across state lines.
The tension has lead to high costs of law enforcement and missed opportunities to collect tax revenue. Furthermore, it has prevented professional and reliable research from being conducted. Please explain the benefits that are expected from leaving the current laws in place rather than enacting revisions such as Federal Marijuana Prohibition Act.