(... sneaks back into the forum as if the last 6 months of intense shamanistic practices hadn't cut him off from 21st century society in any way...)
In the US, you are an official religion if you file your religion with any state or territorial government, providing some basic information on who are the equivalent of corporate officers for the religious organization. By virtue of the 1st amendment, the state has no right to evaluate or judge your religious principles except as might regard to criminal activity at the time of filing. Other states and federal territories are then basically required to accept your registration in the same manner that they would any incorporated entity. If anyone has filed and maintained the paperwork in any state or territory, then that covers the entirety of the organization as recognized by the filers, similar to copyright protection. I believe the Jedi are currently filed/recognized in this manner. It is likely that the founder, Bobby, has copyright protection regarding FSM material, so he may have to write permission for the use of the significant names/symbols he has authored.
The true question, perhaps, is whether it is beneficial to the CotFSM to file such papers or not. Debate follows?
In case you didn't realize it, I DO have a sense of humor. How about you?
"I will not fear. Fear is the mind-killer... I will face my fear. I will let it pass over and through me, and when it has gone, only I will remain." --The Bene Gesserit
"Time is a spiral. Space is a curve. I know you get dizzy, but try not to lose your nerve." -- Neil Peart
"I'm not in the ship. I am the ship." -- River Tam
"The truth is simple. It's the lies that get complicated." -- me
"No matter where you go, there you are." --Buckaroo Banzai