"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 BlumenauerFearing crackdown, marijuana advocates turn to Congress House Democrat introduces bill to amend presidential removal procedures Marijuana legalization grows closer with Senate tax proposal MORE (D-Ore.), Sam FarrSam FarrMarijuana advocates to give away free joints on Capitol Hill DEA decision against reclassifying marijuana ignores public opinion 19 House Democrats' sites hacked at close of gun sit-in MORE (D-Calif.), Jim MoranJim MoranFormer GOP House veterans panel chairman goes to K Street Former reps: Increase support to Ukraine to deter Russia GOP Rep. Comstock holds on to Virginia House seat MORE (D-Va.), and Jared Polis (D-Colo.).