These are links to statutes about provisional custody by mandate from the website of the Louisiana State Legislature.
§951. Provisional custody by mandate; conferring
§952. Duration of provisional custody; termination
§953. Functions, powers, and duties of agent
§962. Statutory form ["a suggested form that may be used by a natural tutor or cotutors with custody, but not yet judicially qualified, or a grandparent awarded custody of a child to delegate to any natural person the custody of the named child:"]
CC Art. 221 Authority of married parents ["The father and mother who are married to each other have parental authority over their minor child during the marriage."]