The Organization for Economic Co-operation and Development (OECD) starts membership talks with six countries, including Bulgaria, according to the OECD's website. The process is also under way for Argentina, Brazil, Croatia, Peru and Romania.

Each country will follow an individual roadmap to reaffirm its commitment to the OECD's values, vision and priorities. OECD Secretary-General Mathias Cormann commented that the candidate countries would be able to use the accession process to promote further reforms.

The organization says there is no deadline for completion of the membership process, as changes in laws, policies and practices may be required.