6. Following issuance of the direction the undertaker shall use its best endeavours to complete the remedial requirements identified in the direction as soon as reasonably practicable to the reasonable satisfaction of Trinity House. The undertaker shall notify Trinity House of completion of the remedial requirements specified in the direction. Upon receipt of such notification, Trinity House shall as soon as reasonably practicable certify to the undertaker in writing that the actions required pursuant to the direction have been completed, and that no further remedial requirements are required.