From the 2012 Logging In Reporting Instructions:
Proof of obtaining a TWIC may be demonstrated to the Academy in several ways, listed in priority order:
(1) Mail the TWIC to Midshipmen Personnel along with your Passport prior to your arrival.
(2) Surrender the TWIC during in-processing at the Academy.
(3) Show proof of enrollment for a TWIC during in-processing at the Academy by providing a copy of the receipt from the enrollment center if you have not yet been notified that the TWIC is available for pick-up. The student in this case will have to pick up the TWIC at the first opportunity (e.g., authorized leave period in which the student travels to the vicinity of the enrollment center), then surrender the TWIC to Midshipmen Personnel.
(4) Provide a written statement to Midshipmen Personnel during in-processing that states the nearest enrollment center was more than 200 miles from your home and/or would have represented a significant burden on the student or family to enroll for a TWIC prior to reporting. In this case, the Academy will arrange for the student to obtain the TWIC some time during the academic year at the New York City enrollment center. The student must provide the funds to pay for the TWIC, either credit card or check (no cash).
We live in North Dallas and the closed center is over 200 miles away in South Houston. S is planning to go with option 4 above and provide a statement during INDOC registration.