Recommended Practice

Sensitive Security Information Policy


This document establishes minimum standards for handling Sensitive Security Information (SSI) in a transit agency environment.

Document History

Document Number Version Publication Date Publication Related Information
APTA SS-ISS-RP-003-23 Original 05/23/2023 Published Current


Sensitive Security Information (SSI)


Transit agencies are charged with making improvements to the country’s transportation security systems and protecting against terrorist attacks. SSI is a specific category of information that requires protection against disclosure in order to protect the safety of passengers in transportation.

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