McDonald’s will let its restaurants in different markets use region-specific standards for sustainable beef.

The restaurant chain’s Jeffrey Hogue, senior director of global corporate social responsibility and sustainability, told Bloomberg BNA that McDonald’s plans to take a bottom-up approach to achieve its sustainable agriculture goal.

In January, McDonald’s pledged to begin purchasing verified sustainable beef in 2016. The company didn’t, however, say what percentage of its purchased beef will be sustainable in 2016, or give a timeframe for its 100 percent sustainable goal.

In March the Global Roundtable for Sustainable Beef released its draft Principles and Criteria for Global Sustainable Beef document for public comment.

However, the documents does not lay out a set of standards or a certification program; it only offers “a broad road map for this journey, allowing different regions to establish specific indicators, metrics or practices.”