Register Here: Early Summer Starter Application CSUSB Student Registration Summer appointment dates will be available in your Student Center on March 26. Registration begins April 12. Open University Visiting Students - Open University registration for summer classes begins April 30, 2021. If you have met the prerequisites you can register online. Open enrollment begins April 30. Summer Registration Form If you are not currently admitted to a degree program at CSUSB, you can enroll in classes through our Open University program.