The Latest: California pot officials hear litany of problems

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The Latest on a state hearing on proposed rule changes for California's legal marijuana market (all times local):

2 p.m.

The nation's largest legal marijuana market is struggling.

California cannabis regulators heard a long list of complaints and concerns Tuesday at a Los Angeles hearing, as the state considers changes to rules that govern the pot economy.

They include a flourishing illegal market that is undercutting licensed shops. A shaky supply chain that has customers looking at empty shelves. And testing that some say doesn't go far enough to find mold and other potential health risks.

The state's top marijuana regulator, Lori Ajax, said the state remains in a difficult transition period as it attempts to transform what was once a largely illegal market into a multibillion-dollar, regulated economy.

She says, "Unfortunately, there is confusion out there."

California kicked off broad legal sales on Jan. 1.