This flag indicates whether or not a male student has opted to have the information on his FAFSA forwarded to Selective Service so he can be registered.

The ISIR codes and their meanings are as follows:

blank Registration not conducted because the record was not sent to Selective Service.
Y Registration conducted as requested.
N The student's name was forwarded to Selective Service as requested, however the student's registration could not be conducted.
T Registration is conducted 30 days prior to applicant's 18th birthday.