Article 87
Institutions shall determine the amount of qualifying own funds of a subsidiary that is included in consolidated own funds by subtracting from the qualifying own funds of that undertaking the result of multiplying the amount referred to in point (a) by the percentage referred to in point (b) as follows:
the own funds of the subsidiary minus the lower of the following:
the amount of own funds of the subsidiary required to meet the following:
the amount of own funds that relates to the subsidiary that is required on a consolidated basis to meet the sum of the requirement laid down in point (c) of Article 92(1) of this Regulation, the requirements referred to in Articles 458 and 459 of this Regulation, the specific own funds requirements referred to in Article 104 of Directive 2013/36/EU, the combined buffer requirement defined in point (6) of Article 128 of that Directive, and any additional local supervisory own funds requirement in third countries;
the qualifying own funds of the undertaking, expressed as a percentage of the sum of all the Common Equity Tier 1 items, Additional Tier 1 items and Tier 2 items, excluding the amounts referred to in points (c) and (d) of Article 62, of that undertaking.
An institution may choose not to undertake this calculation for a subsidiary referred to in Article 81(1). Where an institution takes such a decision, the qualifying own funds of that subsidiary may not be included in consolidated own funds.