The tertiary education provider has not included information on its website about the impact its policy would have on online-only courses.
Harkness added some programmes offered by EIT included a mix of online learning and on-campus learning, and those programmes would require students to be double vaccinated to take part, as they would need to come on to campus.
He said if a student wanted to inquire about a course they should get in touch with EIT by calling or going online to find out more.
EIT chief executive Chris Collins, in a statement last month announcing its policy, said that they wanted to ensure a safe environment.
Those who hold a valid exemption from the Ministry of Health as well as trades academy (secondary school) students, children enrolled at Ōtātara Children's Centre in Taradale and Manaaki Tamariki in Gisborne, and patients enrolled at the EIT Health Centre are all excluded from the vaccine policy at EIT.