SFI Question

WINDOW NET
A ribbon-type or SFI 27.1 mesh-type window net is mandatory for
any full-bodied car running 7.50 (*4.50) to 9.99 (*6.39) or if vehicle
runs 135 mph or faster. See General Regulations 6:3.


let me see what GR 6.3 says...cause that rule does not say it is required.