Final answer:
AR 600-20 outlines policies for Army activities, but to file a confidential complaint with OSHA, guidelines on their website should be followed. AR 600-20 does not govern OSHA complaints, thus military-specific procedures should be consulted for Army-related complaints.
Step-by-step explanation:
The AR 600-20 is an Army Regulation that provides policies and procedures for Army activities. However, it seems there is a mix-up because the provided reference about filing a complaint is related to the Occupational Safety and Health Administration (OSHA), not the military. To file a complaint with OSHA, one should follow the guidelines outlined on their official website, which details the process for filing a confidential complaint. It's important to accurately follow the instructions and requirements provided by OSHA to ensure that the complaint is processed correctly. When looking for specifics in the AR 600-20 about filing complaints, one needs to review the regulation directly and locate the relevant sections outlining the complaint procedures, which typically involve the chain of command, the Inspector General, or other appropriate channels within the military structure.