Pro hac vice (IPA: ), Latin: "for this occasion" or "for this event" (literally, "for this turn"), is a legal term usually referring to a lawyer who has not been admitted to practice in a certain jurisdiction but has been allowed to participate in a particular case in that jurisdiction.
The right to appear pro hac vice is not guaranteed. Rather, the attorney wanting to practice in a jurisdiction within which he or she is not licensed must specifically request permission from the court to be able to appear as an attorney of record. This is accomplished with a motion to appear pro hac vice, in which an attorney who is licensed in the jurisdiction requests that the non‐licensed attorney be admitted to practice in a particular case.
In addition to the motion, the out-of-jurisdiction attorney is typically required to provide the court with a statement from his local bar association indicating that he is a member in good standing and also pay a small fee to the court or its local bar association (e.g. $25 per year in Delaware federal court, $200 in New York City federal court, $301 per case for Massachusetts appellate courts).
In maritime law, a demise charterer is the considered the owner pro hac vice for limited liability purposes, whereas time or voyage charterers are not.
The expression is also used in the Catholic Church when a titular diocese becomes the title of an archbishop rather than of a bishop. Similarly, when a Cardinal-Deacon is promoted to Cardinal-Priest he usually retains his titular deaconry. This deaconry is then said to be elevated pro hac vice to the rank of a titular church. When referring to a titular diocese or titular deaconry which once was elevated pro hac vice but by now has reverted to its original rank the term pro illa vice is used in church documents.