"This conflict is only going to continue to grow over the next few years, and we must provide certainty to the millions of individuals and businesses that remain caught in a web of incompatible laws," he said. "A national commission would provide us with the information we need to create sensible policy going forward."

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The new commission would study how federal laws should be reconciled with state laws, the cost of the federal prohibition on marijuana, and how the federal government should place marijuana in the schedule of the Controlled Substances Act.

It would also examine the health impacts of marijuana, and racial disparities and other consequences related to marijuana possession.

Cohen noted that a national commission on marijuana use was set up in 1971, and it released a report in 1973 that called for the decriminalization of the drug.

"In the four decades since the Shafer Commission, however, the federal government has only expanded its War on Drugs and continued to prohibit the use marijuana," a statement from Cohen's office said.

Cohen's bill is cosponsored by Reps. Earl BlumenauerEarl BlumenauerDems push for tough GMO labeling rule 5 things members of Congress are doing over August recess Lawmakers target horse meat trade MORE (D-Ore.), Sam FarrSam FarrMedical marijuana supporters hopeful about government funding bill Marijuana advocates to give away free joints on Capitol Hill DEA decision against reclassifying marijuana ignores public opinion MORE (D-Calif.), Jim MoranJim MoranBillionaire Trump donor hires lobbyists to help vets Lawmakers: Chaffetz has a point on housing stipend Trump can help farmers by improving two-way trade with Cuba MORE (D-Va.), and Jared Polis (D-Colo.).