Answer:
The information a writer should include in the applicability section of a policy document is:
Header, regarding information about the policy, title, effective date, revision date if applicable, approver's signature, and purpose statement.
Explanation:
The reasons behind the answer are that in the first place the document has to provide information that would make the reading identify the policy, the topics it covers, who supported it, who approved it, the purpose statement as justification, and the revisions that were made to it as well as the date of effectiveness. Because all this data would allow the reader to contextualize with the topic and understand the whole scenario at a single glance.
