State and local regulators are warning dispensary owners against holding off-site parties or allowing on-site cannabis consumption Friday during the annual celebration known as 4/20.

A number of Sacramento-area dispensaries are advertising special events for the day, but most are scheduled for on-site and make no mention of on-site consumption.

One exception is the second annual "Hella 420," billed as "Sacramento's only 4/20 recreational cannabis event." It is scheduled to begin at 1 p.m. at midtown Sacramento's Exhale Smoke Shop and is sponsored by Ohana Gardens, a licensed dispensary.

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