AMC1 CAT.IDE.A.285(a) Flight over water
CAA ORS9 Decision No. 15
ACCESSIBILITY OF LIFE-JACKETS
(a) The life-jacket should be accessible from the seat or berth of the person for whose use it is provided, with a safety belt or restraint system fastened.
(b) On aeroplanes where the certification basis allows the life jacket to be stowed under the passenger seat cushion, the life-jacket should be accessible from the seat or berth of the person for whose use it is provided, when that person is standing in a position adjacent to their seat.