Final answer:
If authorized by the Commander, soldiers may wear the IPFU on and off post and on and off duty, although this permission is not assumed and should be verified with the chain of command.
Step-by-step explanation:
When considering whether the Improved Physical Fitness Uniform (IPFU) can be worn on and off post as well as on and off duty, one must refer to the specific regulations and directives of the branch of the military in question. Generally, for the Army, the decision about the IPFU usage can vary depending on the commanding officer's instructions. If the Commander authorizes, soldiers may wear the IPFU on and off the military installation (post) and while they are not performing official duties (off duty). However, this permission is not automatic and soldiers should always confirm with their chain of command or consult the most current regulation regarding uniform wear.