Notwithstanding any other provision of law, the Trustees of the California State University may enter into agreements with other universities or colleges located within the state whereby qualified students from campuses of the California State University may attend the other universities or colleges without payment of some or all fees or tuition, or both, charged by the other institutions, and students from the other institutions may attend campuses of the California State University without payment of some or all of the fees or tuition, or both, charged by the state university. During any year, however, the number of students attending campuses of the California State University from other universities or colleges, pursuant to the agreements entered in between the Trustees of the California State University and other universities and colleges, shall not exceed the number of students of the California State University attending the other institutions.