Final answer:
Quarterly compliance reports from the Commander of U.S. Fleet Forces Command to the Navy 21st Century Sailor Office are not specifically timed in the provided details, but prompt submission post-quarter is a standard expectation for military reporting.
Step-by-step explanation:
The question pertains to the protocol and timelines by which the Commander of U.S. Fleet Forces Command (COMUSFLTFORCOM) must submit quarterly compliance reports to the Office of the Chief of Naval Operations, Navy 21st Century Sailor Office. While the specific time frame for these reports is not stated in the given information, it is typically expected that such reports should be submitted promptly after the end of each quarter.
This process ensures accountability and adherence to the governance and regulations of naval forces, as outlined by the authority of the U.S. Constitution and military principles. High-ranking naval officers like Fleet Admiral Chester Nimitz during World War II historically have had similar responsibilities in overseeing their respective fleets and maintaining communication with other branches of military leadership.