Is it true that 12P (Prime Power) can only be stationed at 3 locations?

I’m currently at the schoolhouse training to become a 12P. Most people I’ve seen graduate have gone to those three locations already mentioned (Belvior, Bragg, and Schofield) but I assure you there are around a dozen locations worldwide that you can potentially go throughout your career. Some do no become available until you promote to E-7. Hands down, it’s a great job. The 249th is a close knit, well-trained, and proud unit. I couldn’t ask for better place to be.

According to https://www.usace.army.mil/Prime-Power-School/Frequently-Asked-Questions/

The following assignments are available: FT Belvoir, FT Bragg, and Hawaii.

If you got the brief for 12P then you saw the locations. You can go to their website and pull down the brief if you need to.