Hi Andy, It does not need to be reported if it is not relevant. On all my reports where this is the case we put a statement like the following.
"There is no metallurgical testwork that is material to the operational this stage of operation.
The plants are well established and no changes are planned. Accordingly, there has not been any recent testwork completed for the purposes of process design and metallurgical amenability assessment as these are unnecessary for operating plants. The type of ore material is consistent with historical processing, and any metallurgical testwork conducted is to support short term operational issues. The plant recovery factors are benchmarked to actual recoveries achieved by the plant. "
I've never had a problem with this statement.