FWIW:
---------------------------------------
Wisconsin (note this is a city ordinance based on the state WAC).
Section 22-9 Method of Sale of Commodities
(Sections ATCP 91.01 and 91.07 Wisconsin Administrative Code)
(c)
It shall be unlawful to advertise, offer for sale, or sell within the city firewood, fireplace wood, slab wood or stove wood in any other manner than by the cord, fractions of a cord, volumetric measure or by weight.
(1)
Mill ends, lumber scraps, and irregular pieces when sold for fuel shall be sold by net weight.
(2)
The cord is hereby defined for purposes of this section as the amount of wood, or a combustible, fibrous growth, which is contained in a space of one hundred twenty-eight (128) cubic feet, when the wood is ranked and well stowed.
(3)
A single log and packages of such individual logs containing less than four(4) cubic feet, commonly referred to as bundles shall be sold by net weight.
Per custom, one hundred twenty-eight (128) cubic feet generally means a stack of wood four(4) feet by four (4) feet by eight (8) feet. Ranked and well stowed shall be construed to mean pieces of wood placed in a line or row with individual pieces touching and parallel to each other, and stacked in a compact manner.
-------------------------
Pennsylvania:
Sale of Firewood In Pennsylvania
Title 70 of the Pennsylvania Code:
Wood used for fuel shall be sold by the cord of 128 cubic feet (4'X 4' X 8') or fraction thereof and shall be accompanied by a statement or invoice certifying the amount sold and presented to the buyer or his designee at the time of delivery or billing.
Section 2.11 of the Weights and Measures Act of 1965:
Cord: When used in connection with wood intended for fuel purposes, the amount of wood that is contained in a space of 128 cubic feet (4' X 4' X 8') when the wood is racked and well stowed.
Firewood may not be advertised or sold by the truck load, the pile, the piece or any other method other than by the cord or fraction there of. There is no such thing as a face cord. An invoice must be given at the time of sale.
----------------------------
And so it goes, state after state.
I particularly like the last line of Pennsylvania's "There is no such thing as a face cord".
Sure do seem to be a lot of people posting that have no idea of their state regs.
Harry K