Base classic cars can be submitted now for review with the 20 June deadline.
Deadlines for restomod versions of approved base cars and for the vans/trucks are only in 5 or 6 weeks as things are planned now.
There’s no penalty for early submission in any case.
So for the restomod class:
Basically you send me a road car from before 1995 by the 20th.
For example: CSR 102 - A Free Decision. .
I review it and approve it, perhaps with some restrictions to keep balance in class (although design and drivability are more important pure time - it is a showcase event for the sponsers this).
And then by the ultimate deadline (tba) you send me something like this (same chassis and engine, other trim and variant): https://streamable.com/634gn