The National Labor Relations Board (NLRB) has received a petition for a union election from Amazon warehouse employees who work at a fulfillment site outside of Albany, New York, the NLRB informed The Verge on Tuesday. The workers at Amazon’s ALB1 warehouse have applied for a unit that would include about 400 people there.

More than 30% of the proposed unit must have signed union authorization cards in order to launch a union petition. The NLRB is presently making sure that this action has been taken and anticipates verifying the petition in a few days so that it can move forward with setting up a formal election.

The Amazon Labor Union (ALU), which gained union recognition at Amazon’s JFK8 warehouse on Staten Island in April but lost at the company’s LDJ5 facility there in May, represents the employees in Albany. The Retail, Wholesale and Department Store Union (RWDSU) has unionized Amazon warehouse employees in Bessemer, Alabama, but their March union vote was too close to call.

Warehouse workers have attempted to organize the firm, but CEO Andy Jassy has resisted them, warning staff that unions are “far slower and much more bureaucratic” at an all-hands meeting.

According to a statement sent to The Verge by Amazon spokesperson Paul Flaningan, “Our employees have the choice of whether or not to join a union.” “They have ever done. We as a business don’t believe that unions are the greatest option for our employees. To continue making Amazon a fantastic place to work, our key priority is to collaborate closely with our staff.