Any reduced technical requirements allowed by a Member State under Article 23 (4) of this Directive for vessels operating exclusively on Zone 3 or Zone 4 waterways on the territory of that Member State are restricted to the following subjects:
Zone 3
Anchor equipment, including length of anchor chains
(Forward) speed
Collective life-saving appliances
Two-compartment status
Wheelhouse visibility
Zone 4
Anchor equipment, including length of anchor chains
(Forward) speed
Life-saving appliances
Two-compartment status
Wheelhouse visibility
Second independent propulsion system