p. GRI 102-23 Chair of the highest governance body 2017 Annual Report, www.petradiamonds.com/ investors/results-reports (p.56) GRI 102-24 Nominating and selecting the highest governance body 2017 Annual Report, www.petradiamonds.com/ investors/results-reports (p.83) GRI 102-26 Role of highest governance body in setting purpose, values and strategy p.12, 2017 Annual Report, www.petradiamonds.