In southern AZ (Green Valley) winter, officers wear the tux or dark suit. Summer is polo and khaki slacks. Degree work is done in tuxedo. Brothers can wear what they like. I have seen t-shirts in the lodge. I agree no flip flops, shorts, torn jeans, halter tops (see if you are paying attention).
We who are starting AZ's first law enforcement/firefighters degree team will be in full dress uniforms for any degree, summer or winter.
They say "clothes make the man..." but I don't think clothes make the mason. Good men are good men, whether they wear Tuxedos or overalls or coveralls. But nobody listens to me anyway.