What would it take to have a new universal tartan designed and registered for firefighters? I'd love to do that for my brother firefighters.
Well, anyone could design one, and then after that it would just take some effort to get it popularly recognized.

The trick is that since there is no overarching "firefighter's union" or other similar authority over firefighters world wide, there is no governing body to decree "yes, this is the official firefighters' tartan." So what you'd have to do is basically design a personal "fasion" tartan called "Firefighters" and then work to get it recognized on a broader scale -- what we call "wont and useage."

No over-arching governing body has ever authorized the Clergy tartan, but since it has been used for nearly 200 years, it is universally recognized as a tartan used by clergy. So we say it has become official through wont and useage.

So it may take some time to get a universal firefighters tartan accepted in the same way, but the first step would be to simply design one. Then you'd have to try and promote the heck out of it among your fellow firefighters.

Who knows, with a good marketing effort, it might just take off!

Aye,
Matt