A late 2011 ruling by the National Labor Relations Board (NLRB) now allows for “micro-union” formation, a move opposed by business groups that warn the decision is unfair and overturns more than a half-century of labor law precedent.

In May 2012, the NLRB allowed the women's shoe department of a Neiman Marcus retail store in New York to form a union without a vote from the total retail workforce of the store or company. Subsequent “micro-unions” are being pursued by maintenance employees at a Nestle-Dryer Ice Cream plant and behind-the-counter employees at a Dollar Thrifty car rental location.

Allowance for the union formation was the result of a NLRB decision that said, “the petitioned-for unit is an appropriate unit for collective bargaining, and the employer has not established that employees in a store-wide unit or in a unit of all sales associates have an overwhelming community of interest with the petitioned-for employees.”

National and state business groups are crying foul.

More than a half-dozen business groups are asking Congress to roll back the  NLRB decision allowing for the smaller bargaining units.

“The micro-unions decision overturns more than 50 years of precedent and would create division in the workplace, increase operational complexities and costs, while also depriving employees of the flexibility and cross-training opportunities they seek. For example, under the micro-union decision organizers could cherry-pick a small segment of employees within one department of one location and target them in an organizing campaign,” said How to win back your ex