Sunday, July 27, 2008; 12:34:34 PM
Hope this eliminates the frustration. 
Like you, I found myself stumbling over sections of rules and regs. but finally located the information in the following:
COUNTY ZONING ORDINANCE'S dated June 20, 2005 (w/ammendments through 02-19-08) on page 95.
D. Yard Sales. A permit is not required; however, a resident and/or family household is limited to no more than four separate yard sales, each of which may consist of a one- or two-day period within any calendar year, within any residential or agricultural district. The hours of operation are limited to daylight hours on the day(s) the sale occurs. The person conducting the yard sale (tenant or property owner) shall be responsible for the prevention of any negative effects on neighboring properties and prevention of impeding the normal flow of traffic on public rights-of-way. Also, the person conducting the sale shall ensure that all property being sold is personal property, as defined in Article II, and that any residual items at the conclusion of the sale are not stored outside the residential dwelling in a permanent or semi-permanent
96
County Zoning Ordinance June 20, 2005 (w/ amendments through 02-19-08)