The two true statements regarding cross-validation rules are that you need to run the Cross-Validation Rules process to list and optionally disable combinations that violate rules, and that the rules will validate and apply to new and existing accounts. The Cross-Validation Rules process is a scheduled process that identifies existing account combinations that violate cross-validation rules and optionally disables them. You can run this process after defining or modifying cross-validation rules to ensure data integrity. The cross-validation rules will validate and apply to new and existing accounts, as they are enforced whenever an account combination is created or updated. The rules do not apply to new accounts only, as they also apply to existing accounts. There is no need to run the Cross-Validation Rule Violations process, as this is not a supported option. There is no need to create cross-validation rules if Dynamic Combination Creation Allowed is not enabled for your chart of accounts instance, as this is not a relevant factor. Dynamic Combination Creation Allowed is an option that determines whether users can create new account combinations on the fly or only use predefined combinations. Reference: Oracle Financials Cloud: General Ledger 2022 Implementation Professional Objectives - Define Chart of Accounts 12