Following "test-a-true-prophet",
After reading Rambam (Yesodey Hatora) that describes the idea of prophecy and prophethood, I understood, that at some point of time a "prophecizing" person must become an official prophet, so everyone must listen to him and fulfil his commands, etc.
In the times of prophets (from Moses to the beginning of the Second Temple), what institute authorized newly emerging prophets? Was it Sanhedrin, was it the King, was it another authorized prophet?