Period of validity and amendment of regulations
Article 4
1. Regulations adopted pursuant to Articles 1 and 2 shall apply for a specific period. Aid exempted by a regulation adopted pursuant to Articles 1 and 2 shall be exempted for the period of validity of that regulation and for the adjustment period provided for in paragraphs 2 and 3 of this Article. 2. Regulations adopted pursuant to Articles 1 and 2 may be repealed or amended where circumstances have changed with respect to any important element that constituted grounds for their adoption or where the progressive development or the functioning of the internal market so requires. In that case the new regulation shall set a period of adjustment of six months for the adjustment of aid covered by the previous regulation. 3. Regulations adopted pursuant to Articles 1 and 2 shall provide for a period as referred to in paragraph 2 of this Article, should their application not be extended when they expire.