18. Commission Implementing Decision of 23 June 2014 on additional historical aviation emissions and additional aviation allowances to take into consideration the accession of Croatia to the European Union (2014/389/EU) - European Air Law (Update) View the chapter 18. Commission Implementing Decision of 23 June 2014 on additional historical aviation emissions and additional aviation allowances to take into consideration the accession of Croatia to the European Union (2014/389/EU) by - European Air Law (Update) 18. Commission Implementing Decision of 23 June 2014 on additional historical aviation emissions and additional aviation allowances to take into consideration the accession of Croatia to the European Union (2014/389/EU)