2.3.1 An isolation valve capable of manual operation
                           should be provided at each tanker vapour connection. The operating
                           position of this valve should be readily determined visually.
                        
                        
                        
                      
                     
                     
                     
                        
                        
                         
                           2.3.2 The end of each vapour collection pipe or
                           vapour collection hose should be readily identifiable to prevent misconnection.
                        
                        
                        
                      
                     
                     
                     
                        
                        
                         
                           2.3.3 In order to prevent the possible misconnection
                           of the vapour manifold to a shoreside terminal liquid loading line,
                           each tanker vapour connection flange should conform to the applicable
                           industry standardfootnote. This provision
                           is applicable regardless of the size of the vessel.
                           
                        
                        
                        
                      
                     
                     
                     
                        
                        
                         
                           2.3.4 Each vapour collection hose should meet
                           the following:
                        
                        
                        
                        
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                                 .1 be suitable for the service;
                              
                              
                              
                            
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                                 .2 be electrically continuous; and
                              
                              
                              
                            
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                                 .3 have an extra hole in each flange in accordance
                                 with the applicable industry standardfootnote.