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F.5.3.1 Any holes in any regulated tubing (other than inspection holes) must be addressed on the SES.
F.5.3.2 Technical Inspectors may check the compliance of all tubes. This may be done by ultrasonic testing or by the drilling of inspection holes on request.
F.5.3.3 Regulated tubing other than the open lower ends of Roll Hoops must have any open ends closed by a welded cap or inserted metal plug.
Explanation
Any holes that are in load bearing tubes need to be adressed in the SES to prove that the holes don't compromise the structure. When technical inspectors at competition are inspecting the chassis, they may drill holes to validate the tube size that is used. These holes drilled by technical inspectors do not need to be addressed on the SES or cause a rule violation. Tubes with open ends need to have metal caps or plugs closing them (excluding the roll hoops)
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