NOTICE OF CHANGE (AMENDMENTS/WITHDRAWALS) PUBLIC OFFERING OF CROWN PETROLEUM AND NATURAL GAS RIGHTS 2003 MAY 28 12 noon, CALGARY 2003 April 15 Retha Purkis - Manager EDMONTON, Alberta P & NG Agreement Sales ENERGY LEASE SCHEDULE PETROLEUM AND NATURAL GAS LEASES 2003, MAY 28 LEASE HECTARES LAND DESCRIPTION ----- -------- ---------------- THE FOLLOWING PARCEL(S) SHOULD READ AS FOLLOWS --- NORTHERN REGION --- A1064 256 5-15-055: 34 PETROLEUM AND NATURAL GAS BELOW THE BASE OF THE CARDIUM FM (DRRZD 3) ------------------------------------------------------------------------------------- END APPENDIX 2 DEEPER RIGHTS REVERSION ZONE DESIGNATIONS APPLICABLE TO THE 2003, MAY 28 PUBLIC OFFERING NOTICE DRRZD: 3 ZONE: 1700 CARDIUM FM INTERVAL: 6,303.00 - 6,436.00 FEET KEY WELL: 00/16-16-041-06W5/0 LOG TYPE: ELECTRICAL ------------------------------------------------------------------------------------- END