Volume Two 16. Coastal Marine Zone 16.3.6. Marine navigational aid (including lighting) and any supporting structure. 16.3.6.1. The erection or placement of a marine navigational aid (including lighting) must be carried out by, or on behalf of, Maritime New Zealand. 16.3.6.2. Prior to installation, the GPS mapping co-ordinates and a description of the marine navigational aid must be provided to the Harbour Master. 16.3.7. Repair, maintenance or replacement of the existing subsurface Cook Strait cable. 16.3.7.1. No more than 500m of material must be disturbed in any one calendar year. 3 16.3.7.2. The repair, maintenance or replacement works must not adversely affect navigational safety. 16.3.7.3. There must be no contaminants released from equipment being used for the activity. 16.3.8. Replacement of a submarine or suspended cable or line. 16.3.8.1. A cable or line that is being replaced must be removed from the Coastal Marine Zone. 16.3.8.2. A replacement cable or line must be laid or suspended in the same location as the cable or line being removed. 16.3.8.3. A replacement cable or line must be put in place within 1 month of the removal of the original cable or line. 16.3.8.4. A cable or line must be laid or suspended by, or on behalf of, a Network Utility Operator. 16.3.8.5. Prior to installation, the Network Utility Operator must provide location co- ordinates and details of a replacement cable or line to the Council. 16.3.9. Temporary structure or equipment for scientific monitoring purposes. 16.3.9.1. The structure or equipment must not be located within the Coastal Marine Zone longer than 31 days in any calendar year. 16.3.9.2. The structure or equipment must not exceed 2m in length, 2m in width and 1.5m in height. 16.3.9.3. Prior to installation, the GPS mapping co-ordinates and a description of the structure or equipment must be provided to the Harbour Master. 16.3.9.4. The structure or equipment must not adversely affect navigational safety. 16.3.9.5. There must be no contaminants released as a result of the activity, or from equipment being used for the activity. 16.3.10. Clearance of sand, shell, shingle or other natural material from a river mouth for flood mitigation. 16.3.10.1. The clearance must be carried out by, or on behalf of, the Marlborough District Council. 16.3.10.2. Disturbance must be limited to the amount necessary to clear the river mouth for flood mitigation purposes. 16.3.10.3. All equipment must be removed from the site on completion of the operation. 16.3.10.4. The best practicable option must be adopted to avoid significant sedimentation. 16 – 5