Short answer. Yes — under Article 216 of the Family Code, the child's actual custodian, if over twenty-one and not unfit or disqualified, can exercise substitute parental authority. But they are last in the order of preference: the surviving grandparent comes first, then the oldest sibling over twenty-one. The actual custodian steps in only when neither of those is available.

What the law says

In default of parents or a judicially appointed guardian, the following person shall exercise substitute parental authority over the child in the order indicated: (1) The surviving grandparent, as provided in Art. 214; (2) The oldest brother or sister, over twenty-one years of age, unless unfit or disqualified; and (3) The child's actual custodian, over twenty-one years of age, unless unfit or disqualified.

Family Code, Article 216 — Order of Substitute Parental Authority. Read the full provision →

When substitute parental authority applies

Substitute parental authority kicks in when neither parent is available to exercise parental authority and no judicially appointed guardian has been named. Article 216 then provides an ordered list of who steps in. The law prioritises family connections — grandparents first, then older siblings — but acknowledges a practical reality: sometimes the person actually caring for a child is neither a grandparent nor a sibling. For that situation, item (3) of Article 216 recognises the actual custodian as a legitimate holder of substitute authority.

Requirements for the actual custodian

Not just anyone living with the child qualifies. The actual custodian must be over twenty-one years of age, unless unfit or disqualified. Fitness and disqualification are not defined in Article 216 itself, but the overall framework of the Family Code on parental authority implies that a person who poses a risk to the child's welfare, has been convicted of a crime against children, or has demonstrated consistent neglect or abuse would not qualify. The standard centres on the child's best interests, not the caretaker's convenience or preference.

The order matters — actual custodians are last

The phrase "in the order indicated" in Article 216 is not decorative. The surviving grandparent has priority over the oldest sibling, and both have priority over the actual custodian. This means that if a surviving grandparent exists and is willing and able to exercise substitute parental authority, the actual custodian's informal role does not automatically override that. The same is true for the oldest sibling over twenty-one. The actual custodian's authority under Article 216 is specifically a default of last resort when the higher-priority persons are absent, dead, or disqualified.

Property guardianship follows the same order

Article 216 also notes that whenever a judicial guardian over the child's property becomes necessary, the same order of preference applies. This matters when the child has assets — an inheritance, a trust, insurance proceeds — that require management. The person who holds substitute parental authority over the person of the child is not automatically the one who manages the child's property; that requires a separate judicial appointment, which would still follow the Article 216 preference order. If the actual custodian wants to be appointed as property guardian, they can petition the court, but they would need to show why appointing the grandparent or oldest sibling is not appropriate.

Cases citing this provision

These Supreme Court decisions cite the provision above. We list them so you can read them yourself; the summaries of what each decided are not ours to give.

Related provisions

Note. Statute text quoted on this page is reproduced from the official enactment and is linked to the full provision. The explanation around it is general legal information from Vivas & Nobles Law Office, not legal advice. Whether it applies to your situation depends on facts only a lawyer reviewing them can assess.