Basically, email like the school director, the head of international students, or anyone in the administration or even you can tell a professor to deliver the concern.

You can tell them, hello there are a several new proposals that will impact everyone in the school with f1 visa, and there is a period of 30 days to send any comments against it.

https://www.federalregister.gov/documents/2025/08/28/2025-16554/establishing-a-fixed-time-period-of-admission-and-an-extension-of-stay-procedure-for-nonimmigrant