Custody and Visitation Issues: Delegation of Powers of Parent While in Jail

My question involves a child custody case from the State of: Oregon

If a couple has joint custody and a set parenting schedule can one parent have a family member stand in for 'their' time if that parent has to go to jail? Can the Form "Delegation of Powers of Parent or Guardian" be used in this case?

If not how does the jailed parent maintain contact/bond with the child?

Custody and Visitation Issues: Delegation of Powers of Parent While in Jail