EXHIBIT 99.7
                                                                  ------------


         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 annual report of ARC Energy Trust ("ARC") on 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, Steven W. Sinclair,
Vice-President, Finance and Chief Financial Officer of ARC, certify, pursuant to
18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002, that:

1.   The Report fully  complies  with the  requirements  of sections  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 ARC.



/s/ Steven W. Sinclair
-------------------------------------------------
Name:  Steven W. Sinclair
Title:  Senior Vice-President, Finance and Chief Financial Officer

March 29, 2006