4
Lubricants and fuels, namely, oil, natural gas and liquid natural gas, and industrial oils and motor fuels, namely, gasoline and diesel
35
Advertising and business services, namely, business management and administration for others in the fields of energy exploration and production; business management and advisory services, namely, help in the management of business affairs and commercial functions of an industrial or commercial enterprise in the fields of energy exploration and production
36
Insurance and financial services, namely, financial management, and maintaining escrow accounts for investments; investment trust and holding company services, namely, investment and trust company services; brokerage services dealing in shares of real property; services connected with monetary affairs vouched for by trustees, namely, trusteeship representatives, real estate trustee services; and services rendered in connection with the issuance, receipt and transfer of lines of credit in the fields of energy exploration and production, namely, credit processing services
40
Treatment of materials, namely, mechanical and chemical processing and transformation of organic and inorganic substances in the fields of energy exploration and production
42
Computer and scientific services in the fields of energy exploration and production rendered by persons both individually and collectively relating to the theoretical and practical aspects of complex fields of activities, namely, engineering, computer consultation, chemist services, and physicists services; scientific services, namely, scientific research in the fields of energy exploration and production, namely, oceanography, physics and geophysics; engineering services, petroleum engineering services, architectural consultation, and technology consultation services in the field of geology and petroleum engineering, the aforementioned services auxiliary to construction services, namely, inspection of construction plans, inspection of oil and gas exploration and production equipment, inspection of oil, gas and fuel, and inspection of personnel prior to dispatch, while in transit and upon delivery in the field of energy exploration and production
45
Legal services in the fields of energy exploration and production