I recently read that a cast of three or more flies counts as an "umbrella rig" and hence is regulated in Tennessee. If the hook size is 6 or larger, then only one of the flies may have a working hook. The Tennessee Wildlife Resources Agency (TWRA) has posted a drawing of a "size 6 hook". So if you want to fish the old methods of using 3 or more flies in a cast, remember to keep the sizes of all hooks under size 6.

Ed