The Federal Communications Commission’s controversial net neutrality rules will be made official on Nov. 20, and begin the start of legal challenges by telecom giants to overturn the rules.

Verizon Communications said Thursday it plans to file a lawsuit to scrap the regulation that prevents Internet service providers from arbitrarily slowing or blocking data traffic. The company has argued that such rules prevent it from experimenting with new business models and make it difficult to manage traffic congestion on their networks.

A Verizon spokesman said it doesn’t have a firm schedule for when it plans to file the lawsuit. The company, along with Metro PCS, sued to overturn the rules when they were first approved in a narrow three-to-two vote last January.

But a federal judge last April threw out the lawsuits, saying the rules had to be published first in the Federal Register before legal challenge.