The Administrative contact for an entity - identity provider or service provider - registered by a member organisation of the federation is the person responsible for providing and maintaining the registration data of the entity, and for ensuring that federation policy is observed.
The Administrative contact may be the same person as the member organisation's Management Liaison (ML), who serves as the primary registrar and administrator of the organisation's participation in the federation. Alternatively, the Management Liaison may prefer to devolve the function to this designated Administrative contact, normally another member of the organisation with specific responsibility for this entity.
In other words, requests for the modification of an entity should come from either the ML or the Administrative contact.
The Administrative contact should be an actual person, rather than a generic title and email address (such as a mailing list) and may also be the same person as the Support or Technical contact.