Not country specific
The relevant codes are used to compile a Prefeasibility Study, since reserves may sometimes be declared in the prefeasibility stage.
Long form reports
This is the intermediate step in project valuation, and follows a Scoping Study and precedes a Feasibility Study. This study should include trade-off studies to determine the mining and milling extraction methods and rates, product recoveries, environmental issues, legal issues, and preliminary capital and operating cost estimates.