Article 19e 1.

No later than one year after the approval by ACER of the methodology pursuant to paragraph 6, and every two years thereafter, the regulatory authority or another authority or entity designated by a Member State, shall adopt a report on the estimated flexibility needs for a period of at least the next 5 to 10 years at national level, in view of the need to cost effectively achieve security and reliability of supply and decarbonise the electricity system, taking into account the integration of variable renewable energy sources and the different sectors, as well as the interconnected nature of the electricity market, including interconnection targets and potential availability of cross-border flexibility.