A person who requests the issue of a writ of summons to a person in the service of the Commission, shall deposit to the Court an amount corresponding to the loss of time of the witness, which shall be determined by the Registrar of the Court and in any case it shall not be less that fifty euro:
Provided that in case the Registrar of the Court requests so, the Commission shall be obliged to inform him of the official emoluments of the witness summoned:
Provided further that the aforementioned amount of fifty euro shall be returned in case the witness does not appear in Court.