Final answer:
Formal documentation of a Family Care Plan is not required for singles with no dependents, since they do not have immediate responsibilities for the care of others.
Step-by-step explanation:
Formal documentation of a member's Family Care Plan is not required under the circumstance of being a single with no dependents. Single parents, dual-military couples, and dual-civilian couples would generally require documentation because of the potential need to provide for dependents during times of absence, such as deployment. However, for individuals with no dependents, such formal documentation is not necessary, as there is no immediate responsibility for the care of others.