Final answer:
The statement that account workqueues must always have a rule attached is false; it depends on the specific system design and requirements.
Step-by-step explanation:
The statement 'Account workqueues must always have a rule attached' is false. In the context of computer systems or applications where workqueues are used, the requirement for having a rule attached to an account workqueue is not absolute. Workqueues can be designed with flexibility depending on the system requirements and the workflows that they are supporting. Some systems may enforce rules for workqueues to ensure that data is processed in a consistent and automated manner, while others may allow manual processing or the ability to handle items without predefined rules. It is important for a system designer or administrator to determine the need for rules based on the specific use case.