This excerpt taken from the PNC 8-K filed Oct 30, 2008.
Exchange and Division of Option. This Agreement (and the Option granted hereby) are exchangeable, without expense, at the option of the Holder, upon presentation and surrender of this Agreement at the principal office of Issuer, for other Agreements providing for Options of different denominations entitling the holder thereof to purchase, on the same terms and subject to the same conditions as are set forth herein, in the aggregate the same number of shares of Common Stock purchasable hereunder, in which event, the Maximum Profit in each agreement resulting from such exchange shall be allocated among the several agreements in proportion to the number of Option Shares issuable pursuant thereto so that the Maximum Profit for all such agreements shall equal $224,000,000, and (ii) such other adjustments, if any, shall be made as are necessary to preserve the overall economic impact and intent of this Agreement (including Section 16 hereof). The terms Agreement and Option as used herein include any Stock Option Agreements and related Options for which this Agreement (and the Option granted hereby) may be exchanged, and the term Grantee, with respect to any such Stock Option Agreement and related Option, shall include the Holder of such Option resulting from such exchange. Upon receipt by Issuer of evidence reasonably satisfactory to it of the loss, theft, destruction or mutilation of this Agreement, and (in the case of loss, theft or destruction) of reasonably satisfactory indemnification, and upon surrender and cancellation of this Agreement, if mutilated, Issuer will execute and deliver a new Agreement of like tenor and date. Any such new Agreement executed and delivered shall constitute an additional contractual obligation on the part of Issuer, whether or not the Agreement so lost, stolen, destroyed or mutilated shall at any time be enforceable by anyone.