However, a spokesman for the NZ Union of Students' Associations, Max Hardy, said the requirements followed an "erosion of access to tertiary education" over the past few years and would shut even more people out.
"We are very concerned that students, as a result of this change, who could have done very well at university are being shut out."
He said about 985 of this year's first-year university students would not have been accepted under the new requirements because they didn't meet NCEA Level 3.
"That's 8 per cent of students who actually have quite a good chance of completing their qualification and some of them will be doing very well. So, over a period of time, New Zealand is shutting the door to thousands of graduates."
The association estimated about 500 students, including many Maori and Pacific Islanders, would also miss out as a result of the change in approved subjects.
Mr Hardy said lots of students didn't do too well at secondary school but went on to excel in the tertiary environment.
"The sad thing is those students are normally from low-decile schools who really just need a level playing field, and we are concerned those people won't be given a fair go."
Universities New Zealand said the new requirements were more comprehensive and "would help ensure that students achieving university entrance are better prepared for university study".