This Regulation sets out the requirements for financial guarantees that an infrastructure manager may request to ensure that its legitimate expectations about future revenues are met without exceeding a level proportional to the level of activities contemplated by the applicant. The requirements include in particular the conditions when a guarantee or an advance payment may be requested and the level and duration of a financial guarantee. In addition, this Regulation sets out certain details as regards the criteria to assess the capability of an applicant to prepare compliant bids for infrastructure capacity.