1. Transmission system operators shall ensure firm capacity for the access of production facilities of renewable gas and low-carbon gas connected to their grid. To that end, transmission system operators shall, in cooperation with the distribution system operators, develop procedures and arrangements, including investments, to ensure reverse flow from the distribution network to the transmission network. Major investments shall be reflected in the ten-year network development plan pursuant to Article 55(2), point (a), of Directive (EU) 2024/1788.