The TL;DR and why it matters:

Keep in mind, if you read this article, that the FEC gave broadband and TV providers a six month delay on charging customers a rental fee on equipment the customer owns.  Trade groups and lobbyists representing the cable companies asked for an extension because they needed more time to comply with the new law.

Broadband and TV providers will finally be required to stop charging “rental” fees for equipment that customers own themselves, thanks to a new US law that takes effect on Sunday.

The FCC in April granted the six-month delay to ISPs, claiming that providers needed more time to comply because of the coronavirus pandemic. That decision delayed implementation of the new requirements until December 20, 2020.

Source: Law banning “rental” fees for customer-owned routers takes effect Sunday | Ars Technica