Which scenario does not require rule validation?

When a rule is opened after being initially saved, it does not require rule validation because the rule itself has already undergone validation at the time it was saved. The system checks the integrity and correctness of the rule during the save process to ensure that it meets all necessary criteria and is free of errors. Consequently, reopening the rule for viewing or editing does not necessitate revalidation unless changes are made and the rule is subsequently saved again. This allows users to review rules without engaging in the validation process repeatedly, which can save time and resources.

In contrast, saving a rule necessitates validation to confirm that the rule adheres to the expected formats and logic. Similarly, model validation processing checks all rules, including newly created or modified ones, to assure compliance and accuracy. Initiating a calculation also prompts validation, as it involves executing the rules, thus needing assurance that they are correctly constructed.