5.4. Commission Implementing Regulation (EU) 2018/55 of 9 January 2018 amending Implementing Regulation (EU) 2015/1998 as regards adding the Republic of Singapore to the third countries recognised as applying security standards equivalent to the common basic standards on Civil aviation security - European Air Law (Update) View the chapter 5.4. Commission Implementing Regulation (EU) 2018/55 of 9 January 2018 amending Implementing Regulation (EU) 2015/1998 as regards adding the Republic of Singapore to the third countries recognised as applying security standards equivalent to the common basic standards on Civil aviation security by - European Air Law (Update) 5.4. Commission Implementing Regulation (EU) 2018/55 of 9 January 2018 amending Implementing Regulation (EU) 2015/1998 as regards adding the Republic of Singapore to the third countries recognised as applying security standards equivalent to the common basic standards on Civil aviation security