ARC Resources Ltd./ARC Energy Trust Announce the March 2008 increase to the ARX Exchangeable Shares Exchange Ratio

CALGARY, March 3 /CNW/ - (AET.UN and ARX - TSX) ARC Resources Ltd. along
with ARC Energy Trust announces the increase to the exchange ratio of the
exchangeable shares of the corporation from 2.29439 to 2.31375. Such increase
will be effective on March 17, 2008.
The following are the details on the calculation of the exchange ratio:

<<
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Record Opening ARC 10 day Increase Effective Exchange
date of exchange Energy weighted in date of ratio
ARC Energy ratio Trust average exchange the as of
Trust distri- trading ratio increase effective
distribution bution price of (xx) in date
per AET.UN exchange
unit (prior to ratio
the end
of the
month)
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February 29, March 17,
2008 2.29439 $0.20 $23.7049 0.01936 2008 2.31375
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(xx) The increase in the exchange ratio is calculated by dividing the
ARC Energy Trust distribution per unit by the 10 day weighted
average trading
price of AET.UN and multiplying by the opening exchange ratio.
>>

A holder of ARC Resources Ltd. exchangeable shares can exchange all or a
portion of their holdings at any time by giving notice to their investment
advisor or Computershare Investor Services at its principal transfer office in
Suite 600, 530 - 8th Avenue SW, Calgary, Alberta, T2P 3S8, their telephone
number is 1-800-564-6253 and their website is www.computershare.com.

ARC RESOURCES LTD.

John P. Dielwart,
President and Chief Executive Officer