EBU Single Rulebook Q&A 22 January 2019 2019_4472 Meaning of “portfolio” within “sufficiently diversified portfolios” in Article 155(2)

How should the term “portfolio” be understood in the context of the 190% risk weight for private equity exposures in “sufficiently diversified portfolios” in Article 155(2) of the CRR? Does it refer to the whole institution’s portfolio of private equity? Or to any of the “portfolios” that an institution has identified for internal risk management purposes instead?