Proposal for a Regulation of the European Parliament and of the Council establishing an application for the electronic submission of travel data (“EU Digital Travel application”) and amending Regulations (EU) 2016/399 and (EU) 2018/1726 of the European Parliament and of the Council and Council Regulation (EC) No 2252/2004, as regards the use of digital travel credentials [14392/24 - COM(2024) 670 final] - Opinion on the application of the Principles of Subsidiarity and Proportionality