Duchess Skittles - I love that name - someone I know recently applied for a passport, and the application is exactly the same. She actually had to check 'passport' or 'card' at the top. The card is for use for overland or water travel to certain countries, including islands, adjoining the U.S. The passport is required for air travel and for all other countries. I think I'll keep my CIP sheet the same as it is now, but add wording to the policy to state that the institution considers a U.S. Passport Card to be the equivalent of a U.S. Passport in terms of its utility as a form of primary ID.
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"It is natural to give a clear view of the world after accepting the idea that it must be clear." - Albert Camus