Canadian Warrants

Each whole warrant entitles the holder to purchase one unit at a price of $62.78 per unit on or before 5 p.m. (Toronto time) on June 6, 2011. Each unit consists of one Class A capital share and one Class B preferred share (symbol: ABK.PR.B) of the company.

Additional information on the warrant offering may be found in the company's short-form prospectus dated Sept. 22, 2010, which is available at SEDAR. Capitalized terms used but not otherwise defined are as defined in the prospectus.

The company utilizes the book-based system administered by CDS Clearing and Depository Services Inc. with respect to Class A capital shares, preferred shares and warrants. A holder of warrants may subscribe for a whole number of units by instructing the CDS participant holding the subscriber's warrants to exercise all or a specified number of such warrants and forwarding the subscription price for each unit subscribed for in accordance with the terms of the offering and the warrant indenture to the CDS participant which holds the subscriber's warrants. The subscription price is payable in Canadian funds by certified cheque, bank draft or money order drawn to the order of a CDS participant, by direct debit from the subscriber's brokerage account or, by electronic funds transfer or other similar payment mechanism. All payments must be forwarded to the appropriate office of the CDS participant. The entire subscription price for units subscribed for must be paid at the time of subscription and must be received by the warrant agent prior to the date of the exercise of the warrants. Accordingly, a subscriber subscribing through a CDS participant must deliver its payment and instructions sufficiently in advance of the expiry date to allow the CDS participant to properly exercise the warrants on such subscriber's behalf. Units will be issued on a fully paid basis only. Class A capital shares and preferred shares not issued prior to the closing of the record books on a distribution record date will not be eligible to receive the applicable distribution. Holders of warrants are encouraged to contact their broker or other CDS participants as each CDS participant may have an earlier cut-off time.

Each holder of warrants that subscribes for units to which such holder is entitled pursuant to the basic subscription privilege may, at any time during the exercise period, subscribe for additional units pursuant to the additional subscription privilege, if applicable, at a price equal to the subscription price for each additional unit. Holders of warrants will not be required to fully exercise all of their warrants under the basic subscription privilege in order to be eligible for the additional subscription privilege. To apply for additional units under the additional subscription privilege, a beneficial holder of warrants must forward their request to a CDS participant. Payment for additional units, in the same manner as for units, must accompany the request when it is delivered to the CDS participant. Payment in full of the subscription price must be received by the warrant agent prior to 5 p.m. (Toronto time) on the expiry date, failing which the subscriber's entitlement to such units will terminate. Any excess funds will be returned by mail or credited to a subscriber's account with its CDS participant, without interest or deduction. Class A capital shares and preferred shares will be issued on a fully paid basis only. Class A capital shares and preferred shares not issued prior to the closing of the record books on a distribution record date will not be eligible to receive the applicable distribution. Holders of warrants are encouraged to contact their broker or other CDS participants as each CDS participant may have an earlier cut-off time.

The Class A capital shares and preferred shares are not registered under the 1933 act. The offering is made in Canada and not in the United States. The offering is not, and under no circumstances is to be construed as, an offering of any Class A capital shares and preferred shares for sale in the United States or an offering to or for the account or benefit of any U.S. person or a solicitation therein of an offer to buy any securities. Accordingly, the warrants may not be distributed to shareholders located in the United States, and no subscriptions will be accepted from any person, or their agent, who appears to be, or who the company has reason to believe is, resident in the United States.

It is expected that the CDS participant will, prior to the expiry date, attempt to sell for the U.S. shareholders the warrants allotable to such U.S. shareholders at the price or prices it determines in its discretion. Any proceeds received by the CDS participant with respect to such warrants are expected to be delivered by the CDS participant as soon as practicable to such U.S. shareholders.

Shareholders whose recorded addresses are outside of Canada, other than the U.S. shareholders, will be permitted to subscribe for units pursuant to the terms of the offering or, if they do not wish to exercise any of their warrants to subscribe for units, will be permitted to sell or otherwise transfer their warrants through a CDS participant provided that they represent to the company that the receipt by them of warrants and the issuance to them of Class A capital shares and preferred shares upon the exercise of the warrants will not be in violation of the laws of their jurisdiction of residence.

As soon as practicable following the exercise of a warrant, the company will pay a fee of 94 cents per warrant exercised to the CDS participant whose client is exercising the warrant and a fee of 63 cents per warrant exercised to Scotia Capital Inc. as dealer manager.

The warrants will be governed by the terms of a warrant indenture to be entered into on Oct. 1, 2010, between the company and Computershare Trust Company of Canada, as warrant agent. The warrant indenture provides for appropriate adjustments to the warrants in the event of stock dividends, subdivisions, consolidations and other forms of capital reorganization.