For the purpose of this Chapter, the following definitions shall apply:
'capital conservation buffer' means the own funds that an institution is required to maintain in accordance with Article 129;
'institution-specific countercyclical capital buffer' means the own funds that an institution is required to maintain in accordance with Article 130;
'G-SII buffer' means the own funds that are required to be maintained in accordance with Article 131(4);
'O-SII buffer' means the own funds that may be required to be maintained in accordance with Article 131(5);
'systemic risk buffer' means the own funds that an institution is or may be required to maintain in accordance with Article 133;
'combined buffer requirement' means the total Common Equity Tier 1 capital required to meet the requirement for the capital conservation buffer extended by the following, as applicable:
an institution-specific countercyclical capital buffer;
a G-SII buffer;
an O-SII buffer;
a systemic risk buffer;
'countercyclical buffer rate' means the rate that institutions must apply in order to calculate their institution-specific countercyclical capital buffer, and that is set in accordance with Article 136, Article 137 or by a relevant third-country authority, as the case may be;
'domestically authorised institution' means an institution that has been authorised in the Member State for which a particular designated authority is responsible for setting the countercyclical buffer rate;
'buffer guide' means a benchmark buffer rate calculated in accordance with Article 135(1).
This Chapter shall not apply to investment firms that are not authorised to provide the investment services listed in points 3 and 6 of Section A of Annex I to Directive 2004/39/EC.