9
Electronic security alarms for protecting residential and commercial structures
11
Energy products and appliances used in connection with plumbing, heating, ventilation, air-conditioning and power generation, namely, boilers, furnaces, water heaters, air-conditioning units and fuel cells
12
Passenger and commercial vehicles powered by natural gas, namely, buses, cars and passenger vans
35
Billing of gas distribution and storage and electric generation units
37
Maintenance and repair of appliances fueled by natural gas, namely, heating, cooking and refrigeration appliances; installation and maintenance of heating, ventilation and air-conditioning equipment; maintenance of gas distribution and storage systems and electric generation units; laying and construction of natural gas pipelines; installation and maintenance of distributive generation units, fuel cell units, microturbine units and gas vehicles; maintaining electric transmission and distribution facilities; construction, operation and maintenance of fiber-optic networks; installation and repair of natural gas cooling and refrigeration systems in residential and commercial buildings; and plumbing services
39
Public utility services in the nature of gas storage, pipeline projects, supply, transportation, cogeneration, and distribution; energy services, namely, distribution of natural gas and electricity
40
Generation of energy; generation of electricity; and production of energy in the form of natural gas
41
Promoting public awareness of the need for energy conservation
42
Engineering consulting; energy usage management; natural gas exploration; land survey services; design of gas distribution and storage systems and electric generation units; engineering, design and integration of fiber-optic networks and electric networks for purposes of transporting data, voice and video signals