Order No. 175 on classification, transport and discharge of liquid substances carried in bulk.

This Order sets regulations and restrictions to all ships dumping liquid substances in bulk. It does NOT, however apply to warships or other ships owned or operated by a state, as long as the ship is used exclusively for non-commercial purposes. Hazardous liquid substances must be classified in X, Y and Z categories in order for Marine authorities and other MARPOL convention countries to be notified of the evaluated risks thereof. Definitions are set in article 13 on allowed discharge of residue of X, Y and Z substances. If irregularities occur on the suspicion of illegal dumping at sea - the Admiral Danish Fleet shall, in cooperation with national and EU Member State authorities, ensure proper monitoring and measures concerning illegal discharge.
The Order consists of 15 Chapters and 3 Appendices; Scope and purpose (1); Definitions (2); Categorization and classification of noxious liquid substances and other substances (3); General provisions of discharge and transport (4); The discharge of substances in Category X (5); The discharge of substances in Category Y and Z (6); Management of ballast water (7); Requirements for discharge (8); Venting of cargo residue (9); Exemption from tank cleaning (10); Use of detergents and additives (11); Cooperation with other countries (12); Penalty (13); Publication of rules (14); Entry into force (15).
Appendix 1 - Guidelines for classification of hazardous liquid substances.
Appendix 2 - Venting/airing procedures.
Appendix 3 - Pre-wash procedures.