A company has reference data stored in multiple custom metadata records that represent default information and delete behavior for certain geographic regions. When a contact is inserted, the default…

A company has reference data stored in multiple custom metadata records that represent default information and delete behavior for certain geographic regions. When a contact is inserted, the default information should be set on the contact from the custom metadata records based on the contact's address information. Additionally, if a user attempts to delete a contact that belongs to a flagged region, the user must get an error message. What is the optimal way to automate this?