The lawsuit, initiated by the Wildgrass Oil and Gas Committee, names Gov. Jared Polis and regulatory agency Colorado Oil and Gas Conservation Commission as defendants.
In Boulder, 13 people have applied and four were eligible for an expungement. In Denver, 48 people have applied so far.
Environmentalists and oil companies have been on edge since the Supreme Court heard oral arguments in the fall.
The program will help people vacate convictions for any marijuana offense now legal under state law. The city estimates around 10,000 convictions could be eligible.
When Jack Phillips refused to bake another cake in 2017, it ignited another legal battle between the Lakewood baker and Colorado.
The governor’s office has received more than 500 applications for clemency in the past eight years.
U.S. District Judge Brian Morris is presiding over a Thursday hearing on whether the moratorium should be reinstated.
Immigration court backlogs have swelled, from 190,000 to almost 800,000 in 2018 — among those asylum claims jumped to almost 150,000 in 2017.
State officials technically have just 28 days to get those in jail a competency restoration, but many wait much, much longer.
Boulder County Assistant District Attorney Ken Kupfner said it was a matter of “fundamental fairness” given that possession of marijuana is no longer illegal.