years respectively after the entry into force of this Protocol.Article 121. Turkey may, during the first eight years of the transitional stage, make the amendments to Annex 3 which are needed to protect the development of a processing industry which did non exist in Turkey at the time of entry into force of this Protocol, or to ensure the expansion in accordance with the Turkish development plan in force at the time, of an existing processing industry. Such amendments may, however, only be made on condition that:- in aggregate they relate to not more than 10% by value of imports from the Community in 1967, calculated at 1967 prices;- the value of imports from the Community of all products listed in Annex 3, calculated at 1967 prices, is not increased.Products added to Annex 3 may immediately be made liable to duties calculated in accordance with Article 11; those products which are removed from that list shall immediately be made liable to duties calculated in accordance with the provisions of Article 10.2. Turkey shall notify the Council of Association of the measures which it proposes to take pursuant to the above provisions.3. To the same end as that mentioned in paragraph 1 above, and whithin the limit of 10% of imports from the Community in 1967, the Council of Association may authorize Turkey, during the transitional stage, to reintroduce, increase or impose customs duties on imports of products subject to the arrangements set out in Article 10.These tariff measures shall not, for any of the tariff headings which they affect, raise the duty on imports from the Community to more than 25% ad valorem.4. The Council of Association may derogate from paragraphs 1 and 3.Article 131. Irrespective of the provisions of Articles 9 to 11, each Contracting Party may suspend in whole or in part the collection of duties applied by it to products imported from the other Party, in particular, as regards Turkey, for the purpose of stimulating imports of certain products necessary for its economic development; the other Contracting Party shall be informed of such measures.2. The Contracting Parties declare their readiness to reduce their duties in trade with the other Party more rapidly than is provided for in Article 9 to 11 if its general economic situation and the situation of the economic sector concerned so permit. The Council of Association shall make recommendations to this end.Article 14Where, in respect of a country outside the Association, Turkey applies a shorter timetable than is provided for in Articles 10 and 11 to the elimination of a charge having effect equivalent to a customs duty, the same timetable shall be applied to the elimination of that charge in respect of the Community.Article 15Without prejudice to Article 7 (2), the Contracting Parties shall, at the latest four years after the entry into force of this Protocol, abolish between themselves, customs duties on exports and charges having equivalent effect.Article 161. Article 7 (1) and Articles 8 to 15 shall also apply to customs duties of a fiscal nature.2. On the entry into force of this Protocol the Community and Turkey shall inform the Council of Association of their customs duties of a fiscal nature.3. Turkey shall retain the right to substitute for these customs duties of a fiscal nature an internal tax which complies with the provisions of Article 44.4. If the Council of Association finds that substitution for any customs duty of a fiscal nature meets with serious difficulties in Turkey, it shall authorize that country to retain the duty on condition that it shall abolish it not later than the end of the transitional stage. Such authorization must be requested within twelve months of the entry into force of this Protocol.Turkey may provisionally continue to apply such a duty until a decision has been taken by the Council of Association.Section IIAdoption by Turkey of the Common Customs TariffArticle 17The Turkish Customs Tariff shall be aligned on the Common Customs Tariff during the transitional stage on the basis of the duties actually applied by Turkey in respect of third countries at the date of signature of this Protocol, and in accordance with the following rules:1. In the case of products on which the duties actually applied by Turkey at the date indicated above do not differ by more than 15% either way from the duties in the Common Customs Tariff, the latter duties shall be applied one year after the second reduction of duties provided for in Article 10.2. In any other case Turkey shall, one year after the second reduction of duties provided for in Article 10, apply duties reducing by 20% the difference between the duty actually applied at the date of signature of this Protocol and the duty in the Common Customs Tariff.3. When the fifth and seventh reductions of customs duties provided for in Article 10 are applied, this difference shall be further reduced by 20%.4. The Common Customs Tariff shall be applied in its entirety when the tenth reduction of customs duties provided for in Article 10 is applied.Article 18Notwithstanding Article 17 Turkey shall, for the products listed in Annex 3, align its customs tariff over a period of twenty-two years in accordance with the following rules:1. In the case of products for which the duties actually applied by Turkey on