How are temples made mutually exclusive in the EDB?

Been searching in the EDB but couldnt find the answer to that question...
How are temples made mutually exlusive (you can start the chain for one type and it removes the others from the building construction menu)?

Thanks

that was hardcoded things for anything that start with "temple" on their building code

I don't know the answer, but you can probably find it in the R:TW modding questions and scriptorium.

Edit: CW beat me to it.