New documents explain why the owner of a local marijuana dispensary wants federal officials to redo a union vote by its workers.

There are Curaleaf cannabis dispensaries throughout metro Phoenix. Workers at one store recently voted to form a union.

But the dispensary owner filed objections with the National Labor Relations Board.

Agency records obtained under the Freedom of Information Act say the owner is protesting because federal labor officials let workers vote by mail, instead of in person. They also dispute whether adequate notice was given of the decision to use mail-in ballots.

A federal judge in Phoenix has barred Curaleaf Arizona from interfering with unionization efforts while an unfair labor practices case against the company awaits review.