Tenn. Code Ann. § 37-1-140: Legal custodian - Duties

(a) A custodian to whom legal custody has been given by the court under this part has the right to the physical custody of the child, the right to determine the nature of the care and treatment of the child, including ordinary medical care and the right and duty to provide for the care, protection, training and education, and the physical, mental and moral welfare of the child, subject to the conditions and limitations of the order and to the remaining rights and duties of the child's parents or guardian. A custodian is also responsible for providing notices as required in § 49-6-3051 , to the principal of the school in which the child is enrolled.

(b) As an alternative to a parent or guardian transferring legal custody pursuant to this section or as otherwise provided by law, a parent or guardian may temporarily provide for the care of a child by executing a power of attorney for care of a minor child, pursuant to the Power of Attorney for Care of a Minor Child Act, compiled in title 34, chapter 6, part 3.