A determination of incapacity or debilitation under this subtitle shall: Be made by the attending physician to a reasonable degree of medical certainty; Be in writing; and Contain the attending physician’s opinion regarding the cause and nature of the parent’s incapacity or debilitation, and the extent and probable duration of the incapacity or debilitation. If a standby guardian’s identity is known to an attending physician, the attending physician shall provide a copy of a determination of incapacity or debilitation to the standby guardian. If requested by a standby guardian, an attending physician shall make a determination regarding the parent’s incapacity or debilitation for purposes of this subtitle. If the parent is able to comprehend the information, a standby guardian shall inform the parent of: The beginning of the standby guardian’s authority as a result of a determination of incapacity; and The parent’s right to revoke the authority promptly after receipt of the determination of incapacity.