Do I have to wear uniform?

The HS i'm going to, High school for law enforcement and public safety (on guy brewer boulevard) says that uniform is required. thing about that is that i have been wearing uniform my whole time in school since preschool. I imagined high school to be different and its the exact same. Is it really a requirement? Cant my parent write a letter saying that she doesn't want me to wear uniform? P.S I didn't choose this hs, i was placed in it after an appeal.