Which type of leave is non-chargeable when the absence is due to medical treatment?

Convalescent leave is considered non-chargeable when the absence is due to medical treatment. This type of leave is specifically designated for service members who are recovering from illness or injury, allowing them the necessary time to heal without it impacting their leave balance. Convalescent leave is typically granted based on a recommendation from medical personnel and is intended to support the member’s recovery process.

In contrast, parental leave, while beneficial and available to military personnel for taking care of a newborn or newly adopted child, is a separate category that has its own guidelines and is chargeable against the member's leave balance. Regular leave is also chargeable and must be planned and approved in advance, impacting the service member's leave days. Sick leave, particularly in some contexts, may also be viewed as chargeable depending on the specific situation and military policies in place.

Thus, convalescent leave stands out as the correct option because it uniquely qualifies as non-chargeable, directly supporting the health and recovery of personnel during times of medical need.