Ok..... I'll answer my own question. After a little research, I discovered the following. My supplier lead me to believe that these specs had been recently revised. They were wrong. First - MIL-P-13949 F, paragraph 3.8 included a requirement for a water mark. Rev G (released in 1987) omitted the requirement in paragraph 3.8. Third - IPC-L -115 B, requirements are word for word from paragraph 3.8 of MIL-P-13949 G