How soon must a copy of the decision and order be delivered or mailed to each party?

The correct answer is that a copy of the decision and order must be delivered or mailed to each party "promptly." This term indicates that the action should be taken without undue delay and emphasizes the importance of timely communication in legal proceedings. This requirement is crucial for ensuring that all parties are informed of the decision as quickly as possible, allowing them to respond or take further action if necessary.

Using "promptly" allows some flexibility based on the circumstances surrounding the case, whereas specific timeframes like 24 hours, one week, or 30 days could lead to unnecessary rigidity. The legal system aims to balance efficiency with fairness, and the term "promptly" effectively captures this balance, ensuring that parties are kept informed while still allowing for the nuances of each situation.