The court-ordered 60-day cooling-off period in the acrimonious labor dispute between AC Transit and Amalgamated Transit Union Local 192 will end on Dec. 22.

The unions argue the changes violate the terms of the cooling-off period. Earlier this week, they asked an Alameda County judge to slap AC Transit with fines and an injunction.

Superior Court Judge Evelio Grillo denied the union's request on Wednesday.