Library Privileges for Spouses and Dependents Spouses and dependents of MIT students, faculty, and staff are entitled to use the libraries. To borrow books, they must register at any of the MIT Libraries circulation desks. Some form of ID is required for registration; circulation staff may require additional verification as appropriate. Cards are valid in all the libraries. No card or ID is needed to read in the library. The Libraries cannot offer Interlibrary Borrowing service to these users.