JAR-OPS Operations Manual Preparation - advice on AMC and IEM.

JAR–OPS 1.730 Seats, seat safety belts, harnesses and child restraint devices.

(a) An operator shall not operate an aeroplane unless it is equipped with:

(1) A seat or berth for each person who is aged two years or more;
(2) A safety belt, with or without a diagonal shoulder strap, or a safety harness for use in each passenger seat for each passenger aged 2 years or more;
(3) A supplementary loop belt or other restraint device for each infant;
(4) Except as provided in sub-paragraph (b) below, a safety belt with shoulder harness for each flight crew seat and for any seat alongside a pilot’s seat incorporating a device which will automatically restrain the occupant’s torso in the event of rapid deceleration;

JAR–OPS 1.935 Equivalent Safety Case (See IEM OPS 1.935)

An operator shall not introduce alternative procedures to those prescribed in this Subpart unless needed and an equivalent safety case has first been approved by the Authority and supported by JAA Member Authorities.