It seems as if the backsliding has already started at Columbia. The university president has told the faculty that there is no ban on wearing masks during protests and that they faculty of the middle eastern studies department won't have to change what they teach.
The whole article is worth a read, but here are some excerpts.
This is going to get ugly. Trump does not like being messed about with like this.
Columbia’s President Faces Angry Faculty in Closed-Door Meetings - Katrina Armstrong warns of ‘devastating’ risk of funding cuts
In the conversations with faculty, Armstrong also downplayed the changes agreed to with the Trump team. One issue Armstrong highlighted was the mask policy. While Columbia’s letter to the Trump team agreed to ban masks that conceal identity during unauthorized protests, Armstrong told faculty there was no mask ban.
On Monday, a statement from the Trump team noted that Columbia agreed to “enforcing a strict anti-masking policy that includes appropriate enforcement mechanisms for violations, including removal from campus or detention for trespassing.”
Several faculty complained the administration was engaged in strategic ambiguity by sending mixed signals to different constituencies—one for the public and one for faculty.
Students on Monday tested the school’s position. A group wore keffiyehs—a black-and-white scarf emblematic of solidarity with Palestinians—as well as face masks. The protesters handed out fliers listing their demands, including establishing Columbia as a sanctuary campus, with protections from deportation or detention.
Among Trump’s demands was placing Columbia’s department of Middle East studies in receivership—meaning a chair from outside the department oversees decisions such as faculty hiring and curricula.
Columbia’s agreement with Trump pledged to appoint a senior vice provost to “ensure the educational offerings are comprehensive and balanced.” Over the weekend, Armstrong and her team said that appointment wouldn’t impact how the department operates.
“The provost office is not going to tell anybody what to teach, ever,” Provost Angela Olinto said.
Armstrong pleaded for unity and patience. “This impossible situation that we’ve been put through, I think has tested us all and certainly tested me in ways that I have never anticipated being tested.”