I love how the one page defines the word kilt, as if that's the minimum standard for what they have to produce to legally call it a kilt.

"General Definition Of A Kilt

The kilt, as referenced above, is a tailored garment which is wrapped around the wearer's body at the waist, hanging down encircling and covering the upper part of the legs above the knees. The fabric is cut so that it is open along a line from the waist to the lower edge (the selvedge on a kilt) with the opening being secured by means of straps and buckles.
The two ends of the kilt fabric overlap considerably to form what are called aprons. These aprons are positioned in the front while the remaining length of the fabric (around the sides and in the back) is pleated.
In addition, the kilt exhibits certain peculiarities of design, construction, and convention which differentiate it from other garments fitting the above description"
Quoted from their website.