DC-ATE, you've misunderstood.
As I understand the concept:
Press and hold the 'on side' take-over button and control will be instantly transferred to that side. Keep it pressed for 40 sec and the other side will then be deactivated until reset, allowing the other side to maintain control permanently.
Thus if an incapacitated CM1 falls against the sidestick and keeps it displaced, as soon as CM2 presses his/her take-over button he/she takes control. After 40 sec he/she can release everything as the CM1 sidestick then has no effect.
Correct?