Outflows associated with shorts - net or gross

According to Article 423(4) 30(5) of the Delegated Regulation (EU) 2015/61 Regulation (EU) No. 575/2013 (CRR) , institutions shall report an additional outflow per ISIN, corresponding to the market value of securities sold short and to be delivered within the 30 day horizon , unless the institution owns the securities to be delivered or has borrowed them at terms requiring their return only after the 30 day horizon , and the securities do not form a part of the institution’s liquid assets . Thus, if an institution has sold short a security on terms requiring delivery within the 30 day horizon, and the institution at the same time owns or has borrowed the very same security for more than 30 days, the institution should not report an outflow, provided the security owned or borrowed is not already reported as a liquid asset. In other words, The outflow on a security sold short cannot be offset by the collateral provided through a different security.  If the security owned or borrowed is reported as a liquid asset, the institution should report an additional outflow for the short position to avoid double counting of the liquid assets.