.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.