After you receive your assignment letter, you must either call the school or login to Apply.LAUSD. Apply online at Choices.LAUSD.Net or mail the application to Choices, P.O. Box 513307, Los Angeles, CA 90051. You must submit a Statement of Intent to Register (SIR) to officially accept your admission offer. Los Angeles-area independent schools agree to common admissions decision notification and reply dates. Use this form or website to indicate whether you accept or decline the admission offer. That's just a welcome to the program letter. Once you are admitted to Cal State LA, you will receive an acceptance letter via email. About Los Angeles Unified. If you have questions, please fill out an admissions inquiry or call us at 213.381.