Regulation 18
                     
                     
                     
                     Fuel oil availability and quality
                        
                     
                     
                     
                     
                     Regulation 18.5 reads as follows:
                     
                     
                     
                     
                     
                     
                     Regulation 18.6 reads as follows:
                     
                     
                     
                     
                     
                     
                     Interpretation:
                           
                        
                     
                     
                     
                     
                     12.1 For the application of these regulations, they should be interpreted as
                        being applicable to all ships of 400 gross tonnage or above and, at the Administration's
                        discretion, to ships of less than 400 gross tonnage.