Miss. Code Ann. § 69-31-13

After May 1, 1979, no person shall use or cause to be used any grain moisture-measuring device which has not been inspected and approved for use by the department; except that after May 1, 1979, a newly purchased grain moisture-measuring device may be used prior to regular inspection and approval if the user of such device has given at least ten (10) days’ notice to the department of the purchase prior to the use of such new device.