Prohac Vice Application:

pro hac vice

(proh hock vee-chay) prep. Latin for "this time only," the phrase refers to the application of an out-of-state lawyer to appear in court for a particular trial, even though he/she is not licensed to practice in the state where the trial is being held. The application is usually granted, but sometimes the court requires association with a local attorney.

http://legal-dictionary.thefreedictionary.com/Pro+Hac+Vice