Official Q&A: VRC 2019-2020: Tower Takeover

Is it permissible to use two (or more) pieces of different types of plastic as long as the total area of all plastic used does not exceed 12"x24"?

Rule <R9> says "as cut from a single 12” x 24 sheet," which implies it is not allowed: <R9> A limited amount of custom plastic is allowed. Robots may use 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.

However, in November 2015 (Nothing But Net) Karthik said that it was allowable. https://www.vexforum.com/t/answered-multiple-plastics/30904 Since previous rulings do not carry over year to year, could I please have a ruling on whether this is allowed.

Thank you.