Uber announced an agreement on Tuesday with a prominent union to create an association for drivers in New York that would establish a forum for regular dialogue and afford them some limited benefits and protections — but that would stop short of unionization.

The association, which will be known as the Independent Drivers Guild and will be affiliated with a regional branch of the International Association of Machinists and Aerospace Workers union, is the first of its kind that Uber has officially blessed, although Uber drivers have formed a number of unsanctioned groups in cities across the country.

“We’re happy to announce that we’ve successfully come to agreement with Uber to represent the 35,000 drivers using Uber in New York City to enhance their earning ability and benefits,” said James Conigliaro Jr., the guild founder and assistant director and general counsel at the International Association of Machinists District 15, which represents workers in the Northeast.

The agreement is Uber’s latest attempt to assuage mounting concerns from regulators and drivers’ groups about the company’s labor model, which treats drivers as independent contractors. That model helps Uber keep its labor costs low, but it excludes drivers from coverage by most labor and employment laws, such as those that require a minimum wage and overtime.