all first-year students enter as unaffiliated (undeclared) students. Students admitted as first-years must apply to affiliate with their intended engineering major once they meet that major’s affiliation criteria and before the start of their fifth semester at Cornell.
https://www.engineering.cornell.edu/advising/choose-your-academic-pathway/#:~:text=Students%20are%20encouraged%20to%20apply%20to%20their,fall%20of%20sophomore%20year%20for%20most%20students).&text=Students%20who%20are%20accepted%20to%20their%20major,in%20the%20major%20following%20the%20upcoming%20semester.
