I'm pretty sure what you are referring to are essentially lease fees (mining assesments) for the Nolan claims as opposed to mining permits:

Section 1.2, page 12 of the Buntdzen Report:

"The majority of all federal mining claims are fully controlled by Silverado. Payment of claim holding fees for the 2008 calendar year is due on or before December 1, 2008, with annual claim assessment due by September 30 of each year."

Silverado in fact got behind at some point, but these were paid.