DIvorce of Islamic Marriage in Lagos State

Does Lagos State allow the use of the Mediation option of ADR for settling Child custody disputes?
If I understand it properly this would mean the divorcing couple can meet the Imam of a registered Muslim organisation, settle the divorce and the child custody. But the question is how does one make such an agreement legal? We need a legal document to confirm the award of custody.

The goal of choosing ARD and not a customary court is that we hope that it can be settled faster. Divorce and custody are not the problem, the problem is making resolutions legally binding.