Nope, every two years. You can send them back to be recertified, but its usually not worth the effort. The cheaper duck-bill style harnesses are nearly as cheap as the recert costs. And there's always the chance that they won't recertify the belts because of wear defects. They usually won't recertify the belt if there is the smallest little wear defect in the webbing.
I'd just get the cheap duck-bill harness for $59 and plan on buying new ones every two years. And believe me, the do check them in tech...they may not always check your helmet certification but they'll always check your harness certification.
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Jeff Chambers
Trophy Stock #3
11.97 Seconds / 114.5 MPH
Chambers Racing Team