42 EXPLORATION, DEVELOPMENT AND PRODUCTION OF CRUDE OIL, NATURAL GAS, NATURAL GAS LIQUIDS AND OTHER RELATED PETROLEUM PRODUCTS; CARRYING ON THE BUSINESS OF MARKETING, NAMELY, MARKET ANALYSIS, RESEARCH, ADVERTISING AND ARRANGEMENT OF DISTRIBUTION OF NATURAL GAS, CRUDE OIL, NATURAL GAS LIQUIDS AND OTHER RELATED PETROLEUM PRODUCTS; AND OPERATION OF OIL AND GAS WELLS;; EXPLORATION, DEVELOPMENT AND PRODUCTION OF CRUDE OIL, NATURAL GAS, NATURAL GAS LIQUIDS AND OTHER RELATED PETROLEUM PRODUCTS; CARRYING ON THE BUSINESS OF MARKETING, NAMELY, MARKET ANALYSIS, RESEARCH, ADVERTISING AND ARRANGEMENT OF DISTRIBUTION OF NATURAL GAS, CRUDE OIL, NATURAL GAS LIQUIDS AND OTHER RELATED PETROLEUM PRODUCTS; AND OPERATION OF OIL AND GAS WELLS;