In August, the Labor Board reversed thirty years of precedent in its Browning-Ferris decision. It is poised to do it again. This time the precedent dates back to 1973.
In Browning-Ferris, the Board expanded the joint employer test from whether the host employer exercises direct control over agency employees to include whether the host employer exercises indirect control (e.g., host employer supervisors tell agency supervisors what their employees should do) and/or have possible control (e.g., the contract with the agency retains direct or indirect control over agency employee wage/hour costs).
Just in case you have not noticed, the Labor Board has created a popular, new protected class – workplace complainers. Complainers may be a cancer in your workforce, but for the very reason they are a cancer, they are protected by the National Labor Relations Act.