Why McLaren’s clever diffuser trick is legal

The intrigue surrounding the MCL35M’s diffuser lies in the central section and what the team has done to work around the new restriction on the height of the strakes that lie within the diffuser.
On the face of it, the regulations introduced for 2021 require the strakes to be 50mm shorter than in previous seasons (3.7.9 b – marked in red, below).

FIA 2021 Regulations
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