Key legal question
Whether the 'structured bonus' under the 1998 remuneration plan was contractually owed or merely discretionary
Extracted holding
The structured part of the variable remuneration had become obligatory through the parties' conduct and wording of the plan, so it was due in principle.
Extracted reasoning
Regular payments over prior years, the new plan's objective criteria, and the bank's conduct supported an objective interpretation that the reservation of voluntariness concerned only the discretionary part.