Victoria University of Wellington Students' Association (VUWSA) academic vice-president Jessica Ye said the law school did not have a strong culture of asking for help.
"We're just really worried about the students who are already quite marginalised at law school and whether they're going to be able to ask for help, or not, and reach out proactively because that's what the hardship threshold is going to require."
Ye said the new policy was regressive and narrow-minded.
"Students deserve inclusive, modern, high-quality learning and teaching practice and going back to this in-person only focus is regressive. It makes education inaccessible for most students with the cost of living crisis."
Students were already sacrificing time in class so they could work to pay bills, Ye said.
A petition is being launched for recordings of all lectures to be made available to students and VUWSA is seeking an urgent meeting with the university's acting vice-chancellor.
The university said it has consulted the Wellington Law Students' Society and other student groups, before making the decision.
The university said 300-level courses will be offered either in-person or through a combination of in-person and online teaching next year.
Disabled Students' Association President Amber-Rose Stinton said they had been pushing for online learning long before Covid-19, but were told it wasn't practical or feasible.
"When it affected everyone and they did finally figure out how to do it, it was kind of a massive relief because now we had the ability to access education in a way that many of us didn't have access to before."
Stinton said students might not want to disclose their disability to lecturers, making the university's new policy a barrier to learning.