Mexus Gold US (MXSG)

[gitreal]

Yes, the proposed rules will affect exploration phase companies like Mexus (see beginning P. 191):

First, the proposed rules would preclude the use of exploration results, by themselves, to derive estimates of tonnage, grade, and production rates, or in an assessment of economic viability. This should reduce the potential for overvaluing the disclosed exploration results.

This was discussed some time ago here: http://investorshub.advfn.com/boards/replies.aspx?msg=123258732

Here is a link to the proposed rules:
https://www.sec.gov/rules/proposed/2016/33-10098.pdf