Extension requests should be submitted 30 days prior to the expiration date of the certificate of public need. This request is more formal than the notice of delay, and the actual procedure to request a time extension should be outlined in the contract.To qualify for an extension of time claim, this must be considered adverse weather. Where Contractor is prevented from completing any part of the Work within the. The name and certification number of the Responsible Land Disturber (RLD) for the project is required at the time of application.