Colorado’s top cops and prosecutors have asked for a two-year pause on any new marijuana laws to give their offices a chance to catch up.

A letter that was sent to lawmakers last week from the leaders of the state’s three main law enforcement groups said that local police ‘cannot keep up with the quantity and speed of constantly-changing marijuana law’

According to the letter, there have been 81 marijuana related bills introduced into the Colorado legislature in the past four years.

“[R]egulation seems to change on a daily basis and this process must be slowed down,” the groups wrote.

Their solution is a two year moratorium on any changes to the law with respect to marijuana laws unless there is a strong public safety element.

The letter was sent by the Colorado Association of Chiefs of Police, the County Sheriffs of Colorado and the Colorado District Attorneys’ Council. It was written, specifically, to help set the agenda for  an off-season legislative committee conducting a cost-benefit analysis of marijuana legalization.

In addition to the moratorium, the letter asks lawmakers to fund two law enforcement work groups that the organizations formed to keep track of legalization’s impacts and to train police officers. The letter also asks the legislature to create a state marijuana liaison to law enforcement.