271 EXHIBIT 10.27 COMMONWEALTH OF AUSTRALIA Petroleum (Submerged Lands) Act 1967 RENEWAL OF EXPLORATION PERMIT FOR PETROLEUM NO. WA-199-P I, GORDON LESLIE HILL, the Designated Authority in respect of the area specified as being adjacent to the State of Western Australia acting for and on behalf of the Commonwealth - Western Australian Offshore Petroleum Joint Authority, hereby, subject to the conditions set out hereunder, grant to LASMO OIL (AUSTRALIA) LIMITED of 4th Floor 40 Kings Park Road WEST PERTH WA 6005 NORCEN INTERNATIONAL LIMITED of Level 12 50 Berry Street NORTH SYDNEY NSW 2060 BRIDGE OIL LIMITED of Level 9 255 Elizabeth Street SYDNEY NEW 2000 PETROZ NL of GPO Box 1010 BRISBANE QLD 4001 a renewal of the exploration permit for petroleum - (a) in respect of each of the blocks that is constituted by a graticular section, or by part of the graticular section, described hereunder; and (b) where, at any time during the renewal term of this permit, a graticular section, or part of a graticular section, so described constitutes a block in respect of each block so constituted. This renewal of permit has effect for a period of five (5) years from the date hereof. INTERPRETATION In this permit "the Act" means the Act under which the permit is granted and includes any Act with which that Act is incorporated and words used in this permit have the same respective meanings as in the Act. 272 DESCRIPTION A. BLOCKS (The reference hereunder are to the names of map sheets of the 1:1 000 000 series published by the Designated Authority and to the numbers of graticular sections shown thereon). KUPANG MAP SHEET Block No. Block No. Block No. Block No. 2592 2663 B 2664 2735 A 2736 2806 B 2807 2808 2878 A 2879 2880 2949 B 2950 2951 2952 3021 A 3022 3023 3024 3093 3094 3095 3165 3166 3167 3168 3239 3240 3311 3312 3379 3450 A 3451 Assessed to contain 33 blocks CONDITIONS 1. (1) Subject to sub-clause (2), during a year of the term of the permit set out in the first column of the following table, the permittee: (a) shall carry out in or in relation to the permit area, to a standard acceptable to the Designated Authority, the work specified in the minimum work requirements set out opposite that year in the second column of the table; (b) may carry out in or in relation to the permit area, to a standard acceptable to the Designated Authority, all or part of the work specified in the minimum work requirements of a subsequent year or years of that term set out opposite that year or those years in the second column of the table; and (c) may carry out in or in relation to the permit area, to a standard acceptable to the Designated Authority, work in addition to the work specified in the minimum work requirements set out opposite that year and in the subsequent year or years, if any, of that term in the second column of the table. (2) The permittee shall not commence any works or petroleum exploration operations in the permit area except with, and in accordance with the approval in writing of the Designated Authority or of a person authorised by the Designated Authority to give that approval. 273 (3) For the purposes of this clause, any work carried out in accordance with paragraph (1) (b) shall, if the Designated Authority in his discretion by instrument in writing so approves, be treated as if it had been carried out in the subsequent year or years of the term of the permit specified by the Designated Authority in that instrument. Year of Term Minimum Work Estimated Expenditure of Permit Requirements in Constant Dollars (indicative only) First 500 km Reprocessing 428,000 Geological and Geophysical Studies Second 200 km Seismic 500,000 Geological and Geophysical Studies Third 300 km Seismic 650,000 Geological and Geophysical Studies Fourth One Well 6,400,000 Geological and Geophysical Studies Fifth One Well 6,400,000 Geological and Geophysical Studies 2. The permittee shall not recover any petroleum from the permit area except as a result of production testing of a well. 3. The permittee shall - (a) furnish to the Designated Authority, in such form as the Designated Authority may from time to time require, full particulars of the quantity of petroleum recovered by the permittee; and (b) permit a person authorised in writing for the purpose by the Designated Authority, or an inspector, to test or examine any measuring device installed that has been, is being or is to be used by the permittee to measure the quantity of any petroleum recovered in the permit area. 4. The permittee shall not construct any installation or install any equipment in the permit area except with and in accordance with the approval in writing of the Designated Authority or a person authorised in writing by the Designated Authority to give that approval. 5. The permittee shall not abandon, suspend or complete any well except with and in accordance with the approval of the Designated Authority or of a person authorised by the Designated Authority to give that approval. 274 6. The permittee shall at all times comply with - (a) the provisions of the Act and of any regulations for the time being in force under the Act; and (b) all directions given to him under the Act or the regulations for the time being in force under the Act; and (c) the provisions of the "Schedule - Specific Requirements as to Offshore Petroleum Exploration and Production - 1990". 7. In carrying out its operations in the permit area the permittee shall take adequate measures for the protection of the environment and shall comply with all Directions of the Designated Authority in relation thereto. 8. The permittee shall, as required by, and within a time specified by, the Designated Authority, submit to the Designated Authority or such other person as the Designated Authority may nominate, any data and field seismic magnetic tapes relating to the relinquished part of the original permit area. Dated at Perth this 16th day of April 1992 MADE under the Petroleum (Submerged Lands) Act, 1967 of the Commonwealth of Australia on behalf of the Commonwealth - Western Australian Offshore Petroleum Joint Authority. /s/ Gordon Leslie Hill DESIGNATED AUTHORITY I certify this to be a true and correct copy of the original and which has been sighted by me. Margaret Beall /s/ M. Beall Petroleum Division, W.A. Dept. of Mines