All standards for reporting reserves require feasibility study to report reserves, sorry I asumed this was common knowledge.
The international JORC standards ( Joint Ore Reserve Committee), generally SEC practice per SEC Guide 7 and comment letters by SEC engineering office, Canadian N3-4101 and CIMM standards, and my understanding of USA SME standards.
To report reserves in addition to requirements for estimating the ore itself, requires metallurgical information, extraction costs, determination of legal and regulatory ability to mine, etc etc. Generally if company not operating an outside study is at least recommended. Such studies can be quite costly.
