Slight thread drift here. What is the status of the right-side net requirement? Is it still just a recommendation also?
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The latest information would be what has been published in the July Fastrack. Effective 11/1/06, they will be recommending a right side net. Quoting:

Item 3. In order to clarify the intent of item 13 from the March Fastrack the CRB is recommending the following language. Effective 11/1/06:
Add new section 39 to section 17 as follows:

39. INSIDE NET (Commonly referred to as a Right Side Net)
A inside net running between the main roll hoop and the dash is recommended for all production-based cars and two-seater sports racers (see
figure 5). It is recommended that the lower strand of the net pass the shoulder and run horizontally from the cage to the dash. The upper
strand should pass the Cg of the helmet in the side view. The net should run parallel to the center of the car in plan view and be as close to the
seat as possible. It is recommended that the net be tensioned tightly and have a way to quickly disconnect it in case the driver needs to exit
through the car in an emergency. Metal collars, or some other equivalent method, should be used to keep the strands of the net from moving
from where they are positioned on the roll cage. If possible, the recommended mounting method is to wrap the net strands around the back of
the seat and attach them to the main hoop upright. However, teams should consult the net manufacturer to verify their recommended method of
mounting.
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