Simplify the following text for a Grade 14 native English-speaking person.
Original: Under the California Master Plan for Higher Education , the University of California is a part of the state 's three-tier public higher education system , which also includes the California State University system and the California Community Colleges system .
Simplified: University of California is a part of the state 's three-tier public higher education system , which also includes the California State University system and the California Community Colleges system .