A company sent a policy to employees but did not state when it would take effect. Which element remained incomplete?

Correct answer: Necessary timing information in the message

A policy message should tell employees what the policy requires and when those requirements begin. Without an effective date or time, employees may follow different rules or be unsure when to act. The sender and channel may be clear, and the issue is not about feedback. The missing effective time is therefore necessary timing information within the message.