Security classifications and protective markings

Use protective markings for government information. Follow your organisation’s procedures to add them.

Add protective markings to government information

If you are working with government information, follow organisational procedures to assess and apply protective markings to sensitive and classified information.

The protective marking will usually be in all capitals at the top and bottom of a page.

Information is assessed and given protective marking to identify if it is sensitive or security classified.

  • Information might be identified as ‘Unofficial’, ‘Official’ or ‘Official: Sensitive’.
  • Information might be security classified as ‘Protected’, ‘Secret’ or ‘Top Secret’.
  • Other protective markings include caveats (such as codewords and special handling instructions) and information management markers. Caveat markings are mandatory and information management markers are optional.

All sensitive and security classified information, including emails, carry protective markings. Information metadata is also marked.

Protective Security Policy Framework (PSPF) requirements include how the information is classified and marked, and what this means for its storage, handling, access and disposal. For more information, consult the PSPF webpages. Or consult your organisation’s protective security policy.

Security classification requirements

The Protective Security Policy Framework (PSPF) explains how protective markings should be formatted. To achieve clearly identifiable protective markings, the PSPF recommends:

  • using capitals, bold text, large font and a distinctive colour (red preferred)
  • placing markings at the centre top and bottom of each page
  • separating markings by a double forward slash to help clearly differentiate each marking.

When you write for the Australian Government, be aware of PSPF requirements for government information. Follow organisational procedures to apply security classifications and protective markings to content before referring to the PSPF.

Agency implementation of the PSPF is supported by the Department of Home Affairs.

Use initial capitals to write about protective markings

In general content, use an initial capital unless you are reporting how the protective marking actually appears on the page. In that instance, write the marking as it appears and use quotation marks.


Only those with an existing Negative Vetting 1 security clearance are considered for supervised temporary access to Top Secret information.

The field report was stamped ‘TOP SECRET’.

Release notes

The digital edition provides detailed information about security classifications and updated information on information management obligations. This responds to users’ needs for clear information about security in the digital environment.

The sixth edition did not include information about the Australian Government protective security policy, the classification of information or protective markings. The chapter ‘Restrictions on publishing’ in the sixth edition focused on legal protections such as copyright, privacy and defamation.

The Content Guide did not include information about security classifications.

About this page


Department of Home Affairs (n.d.) Applying the Protective Security Policy Framework,, accessed 28 September 2023.

Department of Home Affairs (n.d) Information security,, accessed 28 September 2023.

Department of Home Affairs (n.d) Policy 8: classification system,, accessed 28 September 2023.

Department of Home Affairs (n.d.) Security of government business,, accessed 28 September 2023.

This page was updated Thursday 6 June 2024.