You have hit on one of the main key reasons for the need for that lawful excuse provision being in the bill. Certainly, you would want to ensure that this is designed to.... You want to always ensure there are not unintended consequences to any piece of legislation. This legislation is clearly designed to deal with a criminal element who would try to take advantage of a large public gathering of some type in order to cause mischief, mayhem, and damage. In doing so, we want to ensure we are not infringing on anyone who does have legitimate reason or lawful excuse.
You mentioned specifically the religious head coverings. Certainly, that would, with no question in my mind, comprise one form of lawful excuse. Another example might be someone who legitimately has medical bandages of some type that they are required to wear that would cover portions of their face or possibly disguise their identity in some way. Obviously, in that kind of an instance, I'm sure there would be a requirement for there to be some kind of doctor's note of some type. You have to obviously demonstrate that you actually did have a lawful excuse. Those would be a couple of examples that would apply in terms of lawful excuse.