All information in relation to Regulation (EU) 575/2013*, and the relevant legal acts can be found here (includes the amendments to Regulation 575/2013, the consolidated text of the Regulation, relevant implementing and delegated regulations etc).
* Regulation (EU) No 575/2013 of the European Parliament and of the Council of 26 June 2013 on prudential requirements for credit institutions and investment firms and amending Regulation (EU) No 648/2012.