The Merchant Shipping (Tonnage) Regulations 1997

Change of net tonnage necessitating issue of certificate

11.—(1) When alterations in the values of V, V_c, d, N₁ or N₂ as defined in regulations 6 and 7 result in an increase in the net tonnage a new International Tonnage Certificate (1969) incorporating the increased net tonnage shall be issued.

(2) In the case of a passenger ship assigned subdivision load lines in accordance with the Merchant Shipping (Passenger Ship Construction) Regulations 1980 or the Merchant Shipping (Passenger Ship Construction) Regulations 1984 and load lines in accordance with the Load Line Rules only one net tonnage shall be applied. Where the draught corresponding to the Summer load line differs from that corresponding to the deepest subdivision load line the net tonnage shall, subject to paragraph (3)(a), be that determined in accordance with regulation 7 by applying the draught corresponding to the appropriate assigned load line for the trade in which the ship is engaged.

(3) (a) Subject to subparagraph (b) below, where alterations in the values of V, V_c, d, N₁ or N₂, as defined in regulations 6 and 7, or changes in the position of the load lines result in a decrease in the net tonnage, a new International Tonnage Certificate (1969) incorporating the decreased net tonnage shall not be issued until 12 months have elapsed from the date on which the current certificate was issued.

(b) A new International Tonnage Certificate (1969) may be issued forthwith when—

(i) a ship which was registered outside the United Kingdom is re-registered in the United Kingdom;

(ii) a ship undergoes alterations or modifications of a major character such as the removal of a superstructure, which requires an alteration of the assigned load line; or

(iii) the ship is a passenger ship employed in special trades for carriage of large numbers of special trade passengers, such as the pilgrim trade.