It's on page 3-2 and reads (I used blue to indicate the items struck out, but the change here is item "b" in 2015, doesn't appear in item 2016 indicating to me that executive equities etc will be subtracted from the pool of potential profit to be shared):

10. “Pre-tax income” (PTIX) means, for any:
a. the calendar year 2015, the Company’s consolidated pre-tax income calculated in accordance with Generally Accepted Accounting Principles in the United States and as reported in the Company’s public securities filings but excluding: a) all asset write downs related to long term assets, b) gains or losses with respect to employee equity securities, c) gains or losses with respect to extraordinary, one-time or non-recurring events (including without limitation one-time transition or integration costs incurred in connection with the merger of the Company and Northwest Airlines Corporation during the two year period following the merger),, and d) expense accrued with respect to the profit sharing plan., and

b. the calendar year beginning on January 1, 2016, and each calendar year thereafter, the Company’s consolidated pre-tax income calculated in accordance with Generally Accepted Accounting Principles in the United States and as reported in the Company’s public securities filings but excluding: a) all asset write downs related to long term assets, b) gains or losses with respect to special, unusual, or nonrecurring items, and c) expense accrued with respect to any employee profit sharing plan, program or similar arrangement.