http://www.ed.gov/programs/idueshsi/definition.html

Definition of Hispanic-Serving Institutions

A Hispanic-Serving Institution (HSI) is defined as a non-profit institution that has at least 25% Hispanic full-time equivalent (FTE) enrollment. The Title V Program does not pre-certify institutions as Hispanic-Serving Institutions. Institutions that meet these eligibility requirements and want to apply to the Title V Program, simply must submit an assurance with their Title V application with the necessary student enrollment data.