9. ACER shall review national ten-year network development plans to assess their consistency with the Union-wide network development plan for natural gas. If ACER identifies inconsistencies between a national ten-year network development plan and the Union-wide network development plan for natural gas, it shall recommend amending the national ten-year network development plan or the Union-wide network development plan for natural gas as appropriate. If such national ten-year network development plan is elaborated in accordance with Article 55 of Directive (EU) 2024/1788, ACER shall recommend that the relevant regulatory authority amend the national ten-year network development plan in accordance with Article 55(5) of that Directive and inform the Commission thereof.