A Parenting Coordinator shall serve by agreement of the parties or formal order of the court, which shall clearly and specifically define the Parenting Coordinator's scope of authority and responsibilities. (in.gov)
Taking the matter to court to get formal orders on separate maintenance is an option as well, but it helps if you and your spouse have an agreement worked out already. (mediationadvantage.com)
The materials imply a greater formal order for items that are designed for specific use. (abronsartscenter.org)