There are several rulesets in the US and the FRA has worked in the past to harmonise the rules where possible. Of course the day we have a single rule set internationally will be a good one but currently they are not too dissimilar. US competition also normally provide limited exemption for international competitors. It is best to contact the event organiser to discuss the requirements specifically.

The only exception given to requiring a removable link would be for international competitors built to a current ruleset where this type of power switch is allowed. And again this would require prior approval.