The permits must be approved by the district office in which the cache is hidden. Depending upon where you hide your caches, the Clarksville office may or may not be the right district office to handle your application. There is also a district office in Hector, which is closer to the Pedestal Rocks area and may be the proper district office to contact. I am sure you can just mail the application to them, but you give the office a call first to confirm this, as well as ensuring that you have the right district office for your application.
Originally Posted by Semipaw
"Wildness is a necessity." -- John Muir
"When you go to hide a geocache, think of the reason you are bringing people to that spot. If the only reason is for the geocache, then find a better spot." – briansnat