Many public university systems (like the University of California) have specific requirements to be eligible for admission. It’s sometimes confusing to kids and parents who visit the “admissions” sections of those schools’ websites, see the formulas for grades and test scores needed for admission, and get the impression that meeting those requirements means they’ll get into the schools of their choice.
There’s a difference between “requirements for admission” and “requirements for eligibility” at these schools. A school (or a system of schools) that lists requirements for admission will usually come right out and say that you’ll be admitted if you meet those standards. Standards for eligibility, on the other hand, are telling you what the minimum requirements for consideration are. In our University of California system, meeting the minimum requirements means that you’ll be admitted to those schools in the system that accept all eligible applicants. It doesn’t necessarily mean that you’ll get into the specific school of your choice.
It’s like the difference between having the minimum GPA necessary to play on the football team and being named a starter—the former doesn’t necessarily lead to the latter.