It's not easy enforcing the rules when the stakes are high. That's why the FIA governs Formula One with a rod of iron. It could, instead, use a bar of metal matrix composite (MMC) but its own regulations restrict the use of this exotic material. And to make sure none of the race car constructors even attempt to bend the rules around this extremely stiff and light metal, the FIA has appointed independent experts at the UK's National Physical Laboratory (NPL) to be material witnesses.
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