A local jurisdiction shall require any additional mitigation as a condition of approval for a permit, approval, variance, or special exception be completed within 90 days of issuance of the permit, approval, variance, or special exception unless an extension of time is appropriate because of adverse planting conditions, not to exceed an additional 90 days. A local jurisdiction shall institute a criminal prosecution or suit for a civil penalty for a violation within three years after a Commission or the local jurisdiction knew or reasonably should have known of a violation.