To prevent users from creating Change schedules in ServiceNow using Access Control Rules (ACLs), you can modify or create ACLs on the change_schedule table to restrict the create operation. ACLs define permissions based on the user's roles, and by setting the appropriate conditions, you can control who is allowed to create new records in the Change schedule table. First, navigate to System Security  Access Control (ACL) and search for the ACLs related to the change_schedule table. You can either modify the existing ACL rules or create a new one that specifically denies the create permission for users who do not have the required roles, such as change_admin. By doing this, only users with the designated roles will be able to create Change schedules, while others will be prevented from doing so. Additionally, you can ensure that the ACL checks for specific conditions, such as role-based access, so that users without the proper access rights are automatically restricted from performing the action.