You may find that if you pull off the existing signals they are stamped "DOT approved" on the plastic on the underside of the blinker. If so, point it out and there should be zero reason for him to fail you. If the blinkers aren't DOT approved, then it might be a different story... But I thought those particular ones in the picture were DOT approved by design anyway.
Cheers,
=-= The CyberPoet
Cheers,
=-= The CyberPoet
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