Dear Sir,
The problem with using minerals (salt) is that it seeps into the ground and cannot be easily removed. If there is any residue or salt still in the ground, then the area cannot be hunted. The manufacturers of these products don't often put the word "Salt" on the packaging. They usually use the scientific names such as Sodium Chloride or NaCl or some derivative of that. In most instances you have to dig out a considerable area to remove all of the salt from the ground. Unfortunately, you cannot put a number of days to identify when you could resume hunting an area like that. The best measure is to not put the salt out. If you will notice on the packaging of almost every single "attractant" out there - salt is in the ingredients.
If you were to feed with corn or apples, then it is easy to remove the bait from the area so it can be hunted after September 1.
As far as spraying your boots with C'mere Deer (which contains salt in both the liquid form and the solid form) you could be considered to be baiting.
You need to use scents for cover, not food attractants.
I hope this has answered your questions.
Good luck,
Scott
Lieutenant Scott E. Naff
VA Department of Game and Inland Fisheries
3801 John Tyler Memorial Highway
Charles City, VA 23030
804-829-6580 (office)
804-400-3623 (cell)