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Production minimums
Group B, Appendix J: two hundred examples in twelve consecutive months, with no restriction on drive layout or induction — and a long argument about what counted as an example.
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The fiche
The homologation form fixed what the car was; anything not on it was illegal, which made the document itself a design constraint.
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Evolution models
Twenty evolution cars were permitted on top of the two hundred, which is how a class built for production cars ended up with purpose-built prototypes.
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Group A and Group N
Group A took the top class for 1987 and required five thousand cars, which changed who could enter and what they could enter with.
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