Clarify tire compound in rules
#30387 from B-Spec Committee · Rule change · TB 21-04 (2021-04 Fastrack)
In GCR, Section 9.1.10.E.7.c, change as follows:
"Hankook P205/50ZR15 Z214 C51 Compound or Hankook 200/580R15 Z217 (rain) is required for the following SCCA Majors,
Super Tour and Runoffs."