.9 For the purpose of calculating EOS3, the draft
                           is that corresponding to the Hydrostatic Balance Loading (HBL) configuration.
                           Ballast may be used to achieve an increased draft only in determining
                           EOS3.
                        
                        
                        
                        
                        Filling levels in the tanks identified for HBL should be equal
                           to the maximum level determined by the formula shown in the Appendix
                           to the Guidelines using uniform nominal oil density and corresponding
                           draft. Refer to the annex.