Note that some schools don't participate in ELC submissions, and it's only for California students. Your school is supposed to ask for permission in the Spring for sending transcripts to UC. This is conducted for what the school finds to be about top ten percent of its new senior class, with four percent actually determined ELC eligible. The high number is due to the fact some top students don't meet specific ELC course requirements or don't have as high a UC-GPA as high school GPA, or reverse. Results should come out around August in a large packet for those designated ELC, and everyone that's at least evaluated gets a letter with a number to access a prepopulated UC application. Check and see if your school submitted transcripts here: https://www.ucelc.org/ucschoolstatus...tus_search.htm
While only a few campuses "guarantee" ELC students admission to "most majors," ELC is a strong designation to have. Virtually all ELC students are admitted to all UCs they apply to up to San Diego, and after that odds of admission are way above average. Some other people will disagree, but I feel it was an important factor in my admittance to Berkeley and LA.