Time to put that to the test. Wearing a burqa or a hijab is a religious expression. Are they banned? What action will be taken to ensure that form of expression is suppressed?
Are you expecting them to check underneath?
That would be thoroughly intrusive.
That is an excellent example. For instance, what about wearing a garment with “Jesus” printed on it??? If garments aren’t restricted, why can’t my religion be represented in a similar manner?