The Commission is required to review and report on the implementation and effectiveness of this Chapter, with particular regard to the scope of, and compliance with, the reporting obligations and the modalities of project‑based reporting. The review must take account of international developments—notably on transparency of payments to governments—assess impacts of other international regimes and consider effects on competitiveness and security of energy supply. The review is to be completed by 21 July 2018 and the report submitted to the European Parliament and the Council, with a legislative proposal if appropriate. The report shall consider extending reporting requirements to additional industry sectors, whether payments reports should be audited and the disclosure of additional information including average number of employees, use of subcontractors and pecuniary penalties administered by a country.

The report must also consider, in light of OECD developments and related European initiatives, introducing an obligation for large undertakings to produce annual country‑by‑country reports for each Member State and third country in which they operate, containing at minimum profits made, taxes paid on profits and public subsidies received. In addition, the report shall analyse the feasibility of requiring all Union issuers to carry out due diligence when sourcing minerals to ensure supply chains have no connection to conflict parties and that they respect the EITI and OECD recommendations on responsible supply chain management.