You're mostly right - the vast majority of the car, particularly the survival cell and most structural parts were frozen as of the first round at Austria (referred to as R1-2020), but some changes are permitted by the 8th round (mid-2020) and the first round next year (R1-2021).SmallSoldier wrote: ↑28 Aug 2020, 01:12I didn’t realize that the teams had until the Italian GP to make changes to the chassis, I thought the chassis were already locked considering what they raced as of the Austrian GP... Could you share a bit more information about it please? Would love to read the rules regarding it.Chalke wrote:I imagine all focus was swapped to any components they need to change before the Italian GP when they become locked in until the end of 2021 - electronics, brakes and arguably more interesting, the front crash structure (potentially affecting the nose shape going forward) and the inboard suspension components are on that list.SmallSoldier wrote: ↑27 Aug 2020, 23:12According to Carlos Sainz, aero developments for the MCL35 won’t arrive until at least one more month... Only tweaks to current parts expected for the triple header.
Even when it is known that manufacturing of parts is behind, I’m surprised that it has taken so long for major updates to be ready for the car... I wonder if it’s a new package that needs all parts to be installed together in order to provide the expected performance... Which would explain the delays.
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Aerodynamic parts can be changed afterwards freely but because McLaren lose their 2 tokens as a result of the engine swap, they have to get these parts homologated next week or they're stuck with them.
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The FIA F1 regs are freely available here: https://www.fia.com/sites/default/files ... 5-27_0.pdf
You're looking for Article 22.8 on page 106 for the mention of these dates and Appendix 4 on page 118 for the table of components those dates affect.
Or for a more easily digestible overview, Chainbear did a great overview (as he does many topics) on Youtube - https://www.youtube.com/watch?v=H8BFzubAMa4