For the purposes of s. 206.64, the following words and terms when used herein shall have the following meanings:
(1) “Agricultural purposes” shall be construed to mean motor fuel used in any tractor, vehicle, or other farm equipment which is used exclusively on a farm or for processing farm products on the farm and no part of which is used in any vehicle or equipment driven or operated upon the public highways of this state. This restriction shall not apply to the movement of farm vehicles or farm equipment between farms. The transporting of bees by water and the operating of equipment used in the apiary of a beekeeper and the practice of aquaculture shall be also deemed agricultural purposes.
(2) “Commercial fishing purposes” shall be construed to mean motor fuel used in the operation of boats, vessels, and equipment used exclusively for the taking of fish, crayfish, oysters, shrimp, and sponges from the salt and fresh waters under the jurisdiction of the state for resale to the public, but shall in no way be construed to include fuel used for sports or pleasure fishing, no part of which is used in any vehicle or equipment driven or operated upon the highways of this state.