For UCB, the EECS major in the College of Engineering is direct admission to the major, while the CS major in the College of Letters and Science (L&S CS) is not. I.e. admission to EECS, while more difficult, means that you are in the major, but admission to L&S means that you need to complete the prerequisites and apply to the major after enrolling (currently requires a 3.3 college GPA in the prerequisite courses).
For Michigan, the situation is somewhat similar in that students in engineering can declare CS with a 2.0 GPA, but students in LSA need a 2.5 GPA to declare CS.
http://talk.collegeconfidential.com/discussion/comment/19854939/#Comment_19854939