DENVER | A legislative panel set up to propose marijuana regulations is finishing up its work.

The marijuana committee concludes work Monday. Lawmakers still have to decide a contentious item, whether pot sellers should have to grow most of their product. The question is hotly debated within the marijuana industry. Current medical marijuana law requires pot shops to grow 70 percent of the product they sell, but some complain that requirement is too expensive to enforce and unfairly limits competition.

On Friday, the panel agreed to ask voters to approve a 15 percent excise tax, plus a 15 percent sales tax on the newly legal drug. If the full legislature agrees, voters would be asked about the taxes in November. Commercial pot sales begin in January.