Question no bull

Hello just out of curiosity my significant other is in the military we have been together for 6 years. He was in training for the rangers but he didn’t pass an exam and he got sent to a different country to be stationed there. He’s currently in Germany and when he was in Georgia he told me that he had to sign a paper to turn off his location because that’s how the rangers work. Now he’s in Germany doing infantry and he said he had to sign a paper again that he couldn’t share his location. Is this bull shit? I believed him but I’m having my doubts now because I had other military spouses tell me “oh my god what run mine lets me have his location”. Someone let me know if a paper like this exists.