EXHIBIT 4
                                                                     ---------


                                 CERTIFICATION

         CERTIFICATION REQUIRED BY RULE 13A-14(B) AND SECTION 1350 OF
               CHAPTER 63 OF TITLE 18 OF THE UNITED STATES CODE

In  connection  with the report of Canadian  Natural  Resources  Limited  (the
"Company")  on the Form 40-F for the fiscal year ending  December  31, 2005 as
filed with the  Securities  and  Exchange  Commission  on the date hereof (the
"Report"),  I, Steve W. Laut,  pursuant to 18 U.S.C. 1350, as adopted pursuant
to  Section  906 of the  Sarbanes-Oxley  Act of  2002,  that to the best of my
knowledge:

1.    The Report fully  complies  with the  requirements  of section  13(a) or
      15(d) of the Securities Exchange Act of 1934; and

2.    The information contained in the Report fairly presents, in all material
      respects,  the  financial  condition  and results of  operations  of the
      Company.


DATED this 29th day of March, 2006.


/s/ Steve W. Laut
- ------------------------
Steve W. Laut
President and Chief Operating Officer (Principal Executive Officer),
Canadian Natural Resources Limited