Non-Parent Custody in Illinois: Allocation of Parental Responsibilities Under the IMDMA

What "Allocation of Parental Responsibilities" Means for Nonparents

Illinois replaced "custody" with "allocation of parental responsibilities" in 2016 when it overhauled the Illinois Marriage and Dissolution of Marriage Act (IMDMA). Under 750 ILCS 5/601.2, a nonparent — a grandparent, aunt, uncle, sibling, or close family friend — can petition the circuit court's family or domestic relations division for decision-making authority and parenting time over a child.

This is a separate legal track from probate guardianship. Both can end with you having legal authority over a child, but they operate under different statutes, in different court divisions, with different rules about what the judge considers.

The Standing Threshold

Standing is the gatekeeper, and it's strict. Under 601.2(b)(3), a nonparent can only petition when the child is not in the physical custody of either parent. Physical custody here doesn't mean where the child slept last night — it means whether a parent is actively exercising ongoing caregiving responsibility for the child.

If either parent is currently caring for the child and wants to continue doing so, you don't have standing, and the petition fails at the threshold. This is the practical effect of Troxel v. Granville and Illinois's "superior rights doctrine": fit parents have a fundamental constitutional right to raise their children, and a relative can't override that simply by offering a better environment.

An absence, incarceration, hospitalization, treatment, or death alone does not establish standing or transfer custody. The court looks at whether a parent has voluntarily surrendered ongoing caregiving responsibility and control, and whether the statutory standing requirements are met.

What You Get That's Different From Guardianship

Allocation under the IMDMA divides parental authority into specific decision-making categories — education, healthcare, religion, and extracurricular activities — and parenting time. The court issues a formal parenting plan that can:

• Give you primary decision-making authority in some or all categories
• Set a parenting time schedule for the biological parents
• Include provisions for communication, transportation, and holiday schedules
• Require mediation before either party can seek modifications

This makes it a better fit than guardianship when the goal is a structured, court-supervised co-parenting arrangement rather than full transfer of authority to one person.

When to Choose This Path Over Guardianship

Choose allocation under the IMDMA when:

• You want a formal parenting time schedule that gives biological parents defined visitation
• There's an existing IMDMA case (divorce, parentage) where adding you as a party is procedurally straightforward
• Multiple people need legally defined roles in the child's life
• The family situation is complex enough that ongoing court oversight helps prevent conflict

Choose probate guardianship when:

• You need full, comprehensive authority and the parents are out of the picture
• You want the simpler filing process (no filing fee since October 2025)
• Ongoing court-supervised visitation schedules aren't needed
• You want authority recognized by schools, hospitals, and benefits agencies with minimal additional paperwork

The Filing Process

Allocation petitions are filed in the circuit court's domestic relations or family division — not the probate division. Standard civil filing fees apply, though you can request a fee waiver under Rule 298 if you qualify by income.

Your petition must include the child's current living arrangement, the parents' status, the basis for your standing (why the child isn't in a parent's physical custody), and a proposed parenting plan outlining how decision-making and parenting time should be divided.

Like guardianship, you must serve all parties with notice and may need background checks depending on your circuit's local rules. The judge evaluates the petition under the best-interests-of-the-child standard — but only after confirming that standing exists.

Grandparent Visitation Is a Different Action

Under 750 ILCS 5/602.9, grandparents can petition for visitation time under narrow circumstances. But visitation grants no decision-making authority, no residential custody, and no ability to enroll a child in school or consent to medical treatment. If you need legal authority beyond visiting the child, visitation isn't the right tool.

The Illinois Guardianship and Custody Court Process Guide includes a decision worksheet comparing guardianship, allocation of parental responsibilities, and the short-term guardian form — helping you identify which legal path fits your family's situation before you file.

See more Illinois guides →