I thought it said something about a stiffener to hold it out, but looking again, it doesn't.Gotta say I have loved my "pocket" flag - the big "hassle" of a dive flag for me is it's one more thing to carry down to the water, which can be a lot when you're carrying a camera, scooter and stage bottle. Now I just kick out, then when ready for descent I inflate my flag, once descent is complete I pull it down, deflate and stow it in my pocket (can't tow a flag while scootering efficiently) and at the end of the dive I deploy it from depth, and once I'm back near the shore just deflate it and put it back in my pocket for a hands free exit.
Unless there is a law saying the flag must be "rigid" I'm ok - it's 12"x12"
You do, however, have to display it while you're diving -- so technically, if they see the flag pop to the surface as you're about to ascend, they could cite you:
(emphasis mine).§13-245-9(a) A "diver's flag" as defined by rule and measuring not less than twelve inches by twelve inches shall be required to be displayed on the surface of the water by any person or group of persons engaged in free diving or SCUBA diving.
As I've mentioned here before (and I'll add to my "this might be a cash grab if...") -- technically, as soon as a snorkeller (who is not required to have a flag) does a surface dive, they're now a freediver and need to have a flag... and could be cited for not having one.