International Intelectual Property law allows governments to create national sui generis systems for plant variety protection. A sui generis system can be designed to accommodate both large commercial firms and the less formal exchange of germplasm that is typically used by small-scale producers. But devising an effective sui generis system is not easy. Governments must determine their national interests and then make a judgement among competing international norms (Narasimhan et al., 2008). This policy brief is intended to help goverments make that determination and judgement.