Article 17
1. Member States shall ensure that reproductive material which is placed on the market in accordance with the provisions of this Directive shall not be subject to any marketing restrictions as regards its characteristics, examination and inspection requirements, labelling and sealing other than those laid down in this Directive. 2. Upon its application, a Member State may be authorised, pursuant to the procedure referred to in Article 26(3), to prohibit the marketing to the end user with a view to seeding or planting in all or part of its territory of specified reproductive material. Such authorisation shall be granted only where there is reason to believe: (a) that the use of the said reproductive material would, on account of its phenotypic or genetic characteristics, have an adverse effect on forestry, environment, genetic resources or biodiversity in all or part of that Member State on the basis of - evidence relating to the region of provenance or the origin of the material or, - results of trials or scientific research carried out in appropriate locations, either within or outside the Community. (b) on the basis of known results of trials, scientific research, or the results obtained from forestry practice concerning survival and development of planting stock in relation to morphological and physiological characteristics that the use of the said reproductive material would, on account of its characteristics have an adverse effect on forestry, environment, genetic resources or biodiversity in all or part of that Member State. 3. Detailed rules for the application of paragraph 2 shall be drawn up in accordance with the procedure referred to in Article 26(3). 4. Without prejudice to paragraph 1, Member States which have implemented Article 8 in respect of the forest reproductive material of the category source identified may prohibit the marketing to the end user of such material.