CMS has an elaborate webpage with many links and bulletins about the No Surprises (Out-of-network billing) Act.
Find the main page here:
https://www.cms.gov/nosurprises/policies-and-resources/overview-of-rules-fact-sheets
Find a new FAQ April 6, 2022, here, an 11-page PDF:
https://www.cms.gov/files/document/faq-providers-no-surprises-rules-april-2022.pdf
On the web page, the new 11-page PDF has the snappy title, "Frequently Asked Questions (FAQs) about Consolidated Appropriations Act, 2021 Implementation - Good Faith Estimates (GFE) for Uninsured (or Self-Pay) Individuals – Part 2," which makes it sound like gripping reading and a real page-turner.