AISC were introduced in 2013 to make gold cash costs across the industry more uniform.
While the metrics are outside of the generally accepted accounting principles (GAAP), the standard international guidelines for financial accounting, AISC were aimed at providing a higher level of transparency and consistency.
That year, the World Gold Council put out a guidance note stating what should be included in both AISC and all-in costs.
"We review the guidance note periodically to ensure it continues to support consistency of application and in light of regulatory changes," the WGC said.
"Given the impending implementation of certain new accounting standards, we expect to publish an updated version of the guidance before the end of 2018."