RSA 507-B:7 Limitation on Actions.

I. Except as provided in paragraph II, no actions shall be maintained against the governmental unit under this chapter unless the same is commenced within 3 years after the time of injury or damage, except that when the injury and its causal relationship to the act or omission were not discovered and could not reasonably have been discovered at the time of the act or omission, the action shall be commenced within 3 years of the time the plaintiff discovers, or in the exercise of reasonable diligence should have discovered, the injury and its causal relationship to the act or omission complained of. As a condition precedent to commencement of the action, the clerk of the governmental unit shall be notified by registered mail within 60 days after the time of the injury or damage or di