Article 4
The following shall be added after Article 5: "Article 5a The Member States shall ensure that no variety is accepted unless it is distinct, stable and sufficiently uniform. Article 5b 1. A variety shall be regarded as distinct if, when acceptance is applied for it differs markedly, in one or more important morphological or physiological characters, from any other variety accepted or submitted for acceptance in the Member State in question. 2. A variety shall be regarded as stable if, after successive propagation, it remains true to the description of its essential characters. 3. A variety shall be regarded as sufficiently uniform if, apart from a very few aberrations, the plants of which it is composed are similar as regards the characters, taken as a whole, considered for this purpose.