Use of Lexan and ABS

There is some question that has arisen based on the use of plastic on a robot. Can a single robot use both the Lexan and ABS plastic sheets as long as the total surface area of the plastic does not exceed 288 sq inches (12" x 24" = 288" sq) or could be cut from a single sheet of the material. If all of the pieces could be cut out of a single 12x24 sheet of Lexan, could you cut several of the pieces out of ABS and use the ABS parts instead of the Lexan. So a single bot would have both Lexan and ABS, but the total area would still be cutable from a single sheet of one or the other material.

R7 States -
Non-shattering plastic from the following list; polycarbonate (Lexan), acetel monopolymer
(Delrin), acetal copolymer (Acetron GP), POM (acetal), ABS, PEEK, PET, HDPE, LDPE, Nylon (all
grades), Polypropylene, FEP; as cut from a single 12" x 24" sheet up to 0.070" thick.
i. Shattering plastic, such as acrylic, is prohibited.
ii. Plastic may be mechanically altered by cutting, drilling, bending etc. It cannot be
chemically treated, melted or cast. Heating polycarbonate to aid in bending is

My interpretation of the rule is that the 12"X24" is simply a limit on the amount of plastic that may be used within a bot. Not a restriction to using only a single type of plastic. Please provide clarification of this for us.

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