When carrying cargoes at low temperatures:
                        
                        
                        
                        
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                                 .1 the cooldown procedure laid down for that particular
                                 tank, piping and ancillary equipment shall be followed closely;
                              
                              
                              
                            
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                                 .2 loading shall be carried out in such a manner
                                 as to ensure that design temperature gradients are not exceeded in
                                 any cargo tank, piping or other ancillary equipment; and
                              
                              
                              
                            
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                                 .3 if provided, the heating arrangements associated
                                 with the cargo containment systems shall be operated in such a manner
                                 as to ensure that the temperature of the hull structure does not fall
                                 below that for which the material is designed.