After a complaint, report, or inspection, the Engineering Division may send an operator a specific information request. An operator shall respond to the Engineering Division within 5 working days after receipt of a specific information request relating to an accident reportable under 49 CFR §195.50. Except as provided under §B of this regulation, an operator shall respond within 30 days after receipt of a specific information request. The Commission may waive the requirements of §B or C of this regulation upon written request from an operator demonstrating sufficient cause.