When you look on the Internet for governments and FLOSS, the case of Peru is one of the first you are going to find. The letter that the Peruvian congressman David Villanueva Nuñez wrote to Microsoft is a classic.
Nevertheless, there is not a Peruvian legislative tool that makes FLOSS mandatory or recommends its use in public settings. What exists is the Law 28612 (2005) that recognizes the existence of FLOSS and opens the door to any governmental institution to consider this kind of software. The regulation of the Law (Decree 24-2006-PCM) gives the guidelines of the technical report that should be written prior any software purchase (cost analysis, risks, etc.)
If you want more information about the FLOSS movement in Peru, I recommend you to contact the people of APESOL (they also have a cool banner):
