37 INSTALLATION, REPAIR, EMERGENCY SERVICING AND MAINTENANCE OF GAS APPLIANCES, PIPEWORK, APPARATUS AND INSTRUMENTS UTILIZING GAS; LAYING, REPAIR, MAINTENANCE, REPLACEMENT AND REFURBISHMENT OF PIPELINES; REPAIR OF ROADS AND PATHS; CONSTRUCTION, REPAIR AND MAINTENANCE OF GAS INSTALLATIONS, INSTALLATION, REPAIR AND MAINTENANCE OF ENERGY-USING APPLIANCES AND INSTRUMENTS AND TO THE CONSTRUCTION, REPAIR AND MAINTENANCE OF ENERGY-USING INSTALLATIONS; INSTALLATION OF INSULATING MATERIALS, DRILLING OF WELLS, EXPLOITATION AND EXTRACTION OF OIL AND GAS, OIL AND GAS DRILLING, OIL PUMPING AND EXTRACTION; UNDERWATER CONSTRUCTION; DEMOLITION; BUILDING CONSTRUCTION SERVICES; CONSTRUCTION, MAINTENANCE AND RENOVATION OF PROPERTY