128 
(4) In a case where the ship carries a special list or manifest or a detailed 
stowage plan, required for the carriage of dangerous goods by the Internation:l 
Convention for the Safety of Life at Sea in force, the documents required for 
the purpose of this Annex may be combined with those for dangerous goods. 
Where documents are combined, a clear distinction shall be made between 
dangerous goods and other harmful substances. 
Regulation 5 
STOW AGE 
Harmful substances shall be both properly stowed and secured so as to 
minimize the hazards to the marine environment without impairing the safety 
of ship and persons on board. 
Regulation 6 
QUANTITY LIMITATIONS 
Certain harmful substances which are very hazardous to the marine environ- 
ment may, for sound scientific and technical reasons, need to be prohibited for 
carriage or be limited as to the quantity which may be carried aboard any one 
ship. In limiting the quantity due consideration shall be given to size, con- 
struction and equipment of the ship as well as the packaging and the inherent 
nature of the substance. 
Regulation 7 
EXCEPTIONS 
(1) Discharge by jettisoning of harmful substances carried in packaged forms, 
freight containers, portable tanks or road and rail tank wagons shall be 
prohibited except where necessary for the purpose of securing the safety of 
the ship or saving life at sea. 
(2) Subject to the provisions of the present Convention, appropriate measures 
based on the physical. chemical and biological properties of harmful substances 
shall be taken to regulate the washing of lenkages overboard provided that 
compliance with such measures would not impair the safety of the ship and 
persons on board. 
Regulation 8 
NOTIFICATION 
With respect to certain harmful substances, as may be designated by the 
yovernment of «a party to the Convention, the master or owner of the ship or 
his representative shall notify the appropriate port authority of the intent 
to load or unload such substances at least 24 hours prior to such action. 
Text of Annex IV of the Convention Adopted by the Conference 
ANNEX TV. REGULATIONS FOR TITE PREVENTION OF POLLUTION BY SEWAGE 
From SuIres 
Regulation 1 
DEFINITIONS 
lor the purposes of the present Annex: 
(1)“New ship” means a ship: 
(a) for which the building contract is placed, or in the absence of a build- 
ing contract, the keel of which is laid, or which is at a similar stage of con- 
