Sometime over the holidays, TSA posted the following on the TSA TWIC website:
NEW! NEW ENROLLMENT REQUIREMENTS FOR U.S.-BORN TWIC APPLICANTS:
Starting on July 1, 2015 Transportation Worker Identification Credential (TWIC®) applicants who were born in the United States, and who claim U.S. citizenship, must provide documents to prove their citizenship. Applicants need to bring one document from List A, or two documents from List B as shown below.
Until July 1, 2015 TWIC applicants who were born in the U.S. may continue to certify that they are U.S. citizens by checking the box on the electronically signed TWIC application and bring documents as listed on the UES website here.
TSA is making this change to align TWIC proof-of-citizenship requirements with those of other TSA programs such as the Hazardous Material Endorsement and TSA Pre✓ programs. Requiring proof of citizenship at the time of enrollment will ensure that all TWIC applicants meet eligibility requirements for the credential.
Acceptable Documentation Providing Proof of U.S. Citizenship
List A: Bring one of the following:
• Unexpired U.S. Passport (book or card) – demonstrates U.S. Citizenship
• Unexpired U.S. Enhanced Driver’s License (EDL) – demonstrates U.S. Citizenship if indicated on card
• Unexpired Enhanced Tribal Card (ETC) – demonstrates U.S. Citizenship
• Unexpired Free and Secure Trade (FAST) Card – demonstrates U.S. Citizenship if indicated on the card
• Unexpired NEXUS Card – demonstrates U.S. Citizenship if indicated on the card
• Unexpired Secure Electronic Network for Travelers Rapid Inspection (SENTRI) Card -- demonstrates U.S. Citizenship if indicated on the card
• Unexpired Global Entry Card -- demonstrates U.S. Citizenship if indicated on the card
List B: Or, bring one of the following plus a government-issued photo ID:
• Original or certified copy of birth certificate issued by a State, county, municipal authority, or outlying possession of the U.S. bearing an official seal
• U.S. Certificate of Citizenship (N-560 or 561)
• U.S. Certificate of Naturalization (N-550 or 570)
• U.S. Citizen Identification Card (I-179 or I-197)
• Consular Report of Birth Abroad (FS-240)
• Certification of Report of Birth (DS-1350)
• Certification of Birth Abroad (FS-545)
• Expired U.S. passport within 12 months of expiration*
*An expired U.S. passport may not be presented by itself. It must be presented with at least one other document (and a name change document if needed).