EXHIBIT 99.4
                                                                   ------------


               CERTIFICATION REQUIRED BY RULE 13A-14(A) OR 15D-14
               OF THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED
            PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002


CERTIFICATIONS

I, John P. Dielwart, certify that:

1.   I have reviewed this annual report on Form 40-F of ARC Energy Trust;

2.   Based on my knowledge,  this report does not contain any untrue  statement
     of a material fact or omit to state a material fact  necessary to make the
     statements made, in light of the circumstances under which such statements
     were made,  not  misleading  with  respect  to the period  covered by this
     report;

3.   Based on my  knowledge,  the  financial  statements,  and other  financial
     information  included  in this  report,  fairly  present  in all  material
     respects the financial condition,  results of operations and cash flows of
     the issuer as of, and for, the periods presented in this report;

4.   The  issuer's  other   certifying   officer  and  I  are  responsible  for
     establishing  and  maintaining  disclosure  controls  and  procedures  (as
     defined in  Exchange  Act Rules  13a-15(e)  and  15d-15(e))  and  internal
     control  over  financial  reporting  (as  defined  in  Exchange  Act Rules
     13a-15(f) and 15d-15(f)) for the issuer and have:

     (a)   Designed such  disclosure  controls and  procedures,  or caused such
           disclosure   controls  and  procedures  to  be  designed  under  our
           supervision,  to ensure that  material  information  relating to the
           issuer, including its consolidated subsidiaries, is made known to us
           by others within those entities,  particularly  during the period in
           which this report is being prepared;

     (b)   Designed such internal control over financial  reporting,  or caused
           such internal control over financial  reporting to be designed under
           our  supervision,  to provide  reasonable  assurance  regarding  the
           reliability of financial  reporting and the preparation of financial
           statements  for  external  purposes  in  accordance  with  generally
           accepted accounting principles;

     (c)   Evaluated the effectiveness of the issuer's  disclosure controls and
           procedures  and presented in this report our  conclusions  about the
           effectiveness of the disclosure  controls and procedures,  as of the
           end of the period  covered by this report based on such  evaluation;
           and

     (d)   Disclosed in this report any change in the issuer's internal control
           over financial  reporting that occurred during the period covered by
           the annual  report that has  materially  affected,  or is reasonably
           likely to  materially  affect,  the issuer's  internal  control over
           financial reporting; and

5.   The issuer's other certifying  officer and I have disclosed,  based on our
     most recent  evaluation of internal control over financial  reporting,  to
     the  issuer's  auditors and the audit  committee of the issuer's  board of
     directors (or persons performing the equivalent functions):

     (a)   All significant  deficiencies and material  weaknesses in the design
           or operation of internal control over financial  reporting which are
           reasonably  likely to  adversely  affect  the  issuer's  ability  to
           record, process, summarize and report financial information; and

     (b)   Any fraud,  whether or not  material,  that  involves  management or
           other employees who have a significant role in the issuer's internal
           control over financial reporting.


Date: March 28, 2007


/s/ John P. Dielwart
----------------------------
JOHN P. DIELWART
President and Chief Executive Officer