The operator's exposition must include the following:
(a) a description of the circumstances in which the operator may assign a flight crew member to duty on aeroplanes of more than one type rating;
(b) the combinations of aeroplanes with different type ratings that a single flight crew member may be assigned to duty on by the operator;
(c) the flying experience, checks and training that a flight crew member must gain or complete, while the flight crew member is employed by the operator, before being assigned to duty on aeroplanes of more than one type rating;
(d) procedures to ensure that, if a flight crew member is assigned to duty on aeroplanes with different type ratings within one tour of duty, the flight crew member has adequate time between flights on aeroplanes with different ratings for the flight crew member to prepare for duty.