An act of the U.S. Congress (1947) that supersedes but continues most of the provisions of the National Labor Relations Act and provides for an eighty-day injunction against strikes that endanger public health and safety and bans closed shops, featherbedding, secondary boycotts, jurisdictional strikes, and certain other union practices.

Summarized from:

www.infoplease.com:
Taft-Hartley Act

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