California Code, Education Code - EDC § 66751

Any student enrolled in any campus of the California Community Colleges, the California State University, or the University of California who meets the requirements of Section 66752 may enroll without formal admission and, except as provided in Section 66753, payment of additional fees, in a maximum of one course per academic term at a campus of either of the other systems on a space available basis at the discretion of the appropriate campus authorities on both campuses.  A student enrolled in a course pursuant to this chapter shall be provided access to necessary instructional support services at the host campus in the same manner as students regularly enrolled in the course.