The simple answer is yes.
If this policy is new or there are new and/or revised provisions being introduced to an existing policy, your employer should draw these changes to the attention of all those who might be affected by them.
This information sharing is vitally important so that everyone knows exactly where they stand. It is fundamentally unfair to punish someone for breaking rules that they don’t know about.
It is also vitally important that your employer trains or retrains all employees who might be responsible for administering the new procedure.