What is the following provision of the Taft hartley act?

The Taft-Hartley Act, enacted in 1947, is a federal law that restricts the activities and power of labor unions. It aims to balance the rights of workers to organize and engage in collective bargaining with the need to protect employers and the public from potential union abuses, such as secondary boycotts and jurisdictional strikes. The Act also prohibits union shops and allows states to pass "right-to-work" laws, which prevent mandatory union membership as a condition of employment. Overall, the Taft-Hartley Act serves to limit union power and promote individual worker rights.