In May 2017 the EU published its EU Conflict Minerals Regulation 2017 in its Official Journal. The law will enter into force on June 8, 2017 with an effective date of January 2, 2021.

The law may be found in the OJ here: http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=OJ:L:2017:130:FULL&from=EN