The Qantas Jet aircraft flying is being spread wider across the Qantas groups (divide and conquer). To bring the pilot groups back to a common goal they all need to have a equal chance. Overseas they have introduced with great success. To provide an fairness during the introduction period, all pilots at the time of implementation within a particular group retained the right of one upgrade bid, within their present company, ahead of someone outside that company. Attrition eventually removes that grandfather type clause and a standard seniority list then prevails.