Ind. Code § 11-8-4-2
As used in this compact, unless the context clearly requires otherwise:
"State" means a state of the United States; the United States of America; a territory or possession of the United States; the District of Columbia; or the Commonwealth of Puerto Rico.
"Sending state" means a state party to this compact in which conviction or court commitment was had.
"Receiving state" means a state party to this compact to which an inmate is sent for confinement other than a state in which conviction or court commitment was had.
"Inmate" means a male or female offender who is committed, under sentence to or confined in a penal or correctional institution.
"Institution" means a penal or correctional facility, including but not limited to, a facility for individuals with a mental illness in which inmates may lawfully be confined.
IC 11-8-4-2