If this is what the rule states, than I have yet to attend a tournament where this is being used. Most regulation mats are 42' x 42'. If you take 10' away for your border, that leaves 32'. That mat cannot be split or quartered for any age group above 10under. It would only allow for 16' x 32' surface if it was split down the middle. Some tournaments even wrestle 14u on these size mats. This is great information. The only way you could split or quarter a mat is if you are using them for 10u and below, or you must add more mat space to a regulation mat.
Richard Blevins
Ottawa Mat Masters President