Am I allowed to watch movies for FREE?

I am a Licensed Care Giver for the State of Washington and I work for a Federal Agency (DSHS - Department of Social and Health Services). I ve been a caregiver for about a year and a half. I learned, from my clients, that I have free admission at movie theatres such as Regal Cinema and Cinemark. And it s true; I ve taken my clients to these movie theatres and i ve gotten in for free (as long as I show I.D and valid state credentials)

MY QUESTION: Is there a RCW (Revised Code of Washington) or a WAC (Washington Administrative Code) that CLEARLY states my authorization to watch movies for free?