TITLE II
CHAPTER I
INTERNATIONAL LETTERS ROGATORY FROM ABROAD
Art. 22
(Immunity of witnesses or experts)
1. No witnesses or experts, whatever their nationality, appearing before the judicial authorities of the requesting State in response to a summons, shall be prosecuted or detained or subjected to any other restriction of their personal liberty in the territory of the requesting State for acts or convictions anterior to their departure from the territory of the Republic of San Marino.
2. The immunity provided for in this Article shall cease when the witness or expert, having had the opportunity to leave the territory of the requesting State during a period of fifteen days from the date on which his presence is no longer required by the judicial authorities, has nevertheless remained in the territory, or having left it, has voluntarily returned.
EDIT.