The people who will be coming up with regulations for Colorado’s new recreational-marijuana regime went back to work Thursday with two meetings that only underscored how much they have to do.

The meetings were for two subgroups of the Amendment 64 Implementation Task Force — one dealing with the regulatory framework for a recreational-marijuana industry and the other focused on addressing consumer safety and social issues related to legal cannabis. There are five subgroups that will work through a list of issues, which stretches more than 100 items long, to make recommendations to the full task force.

The full task force will then adopt plans for how lawmakers and state officials should approach recreational-marijuana regulations.

The task force has until the end of next month to issue a report.

“Obviously,” said state Health Department executive director Chris Urbina, the chair of the social-issues subgroup, “we’re not going to be able to talk about these issues in one meeting.”

Among the items Urbina’s subgroup will tackle are whether the state should put limits on marijuana potency; impose requirements on growing standards, labeling and advertising; and implement restrictions to keep marijuana out of the hands of minors.

At the meeting of the Regulatory Framework subgroup, members questioned whether the state should adopt a requirement that only Colorado residents can purchase marijuana at recreational-pot shops.

“I think that’s going to be a big issue,” predicted Bob Dill, a task-force member and Denver lawyer who specializes in regulation law.