1. By way of derogation from Article 50 and until the end of the transitional periods set out in paragraphs 6 and 6a of this Article, the following may include in their Common Equity Tier 1 capital the amount calculated in accordance with this paragraph:
(a) institutions that prepare their accounts in conformity with the international accounting standards adopted in accordance with the procedure laid down in Article 6(2) of Regulation (EC) No 1606/2002;
(b) institutions that, pursuant to Article 24(2) of this Regulation, effect the valuation of assets and off-balance sheet items and the determination of own funds in conformity with the international accounting standards adopted in accordance with the procedure laid down in Article 6(2) of Regulation (EC) No 1606/2002;
(c) institutions that effect the valuation of assets and off-balance sheet items in conformity with accounting standards under Directive 86/635/EEC and that use an expected credit loss model that is the same as the one us
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