Article 15 Cases where disablement or death is due to more than one cause
Where the disablement or death of a person is directly attributable, not to a single qualifying injury or period of detention, but to two or more such causes, and different ranks would, by virtue of the foregoing provisions of this Part of this Scheme, be applicable to the different causes of the disablement or death—
any award in respect of a composite assessment made under sub-paragraph (b) of Article 9(2) of the Naval Order as applied by this Scheme shall be made at a composite rate calculated by reference to the degree of disablement resulting from each such cause and the relevant rank appropriate thereto, so, however, that where the sum of the separate assessments which would have been made in respect of those causes but for the said subparagraph exceeds the amount of the composite assessment, the degree of disablement resulting from the cause to which the lower or lowest of those different relevant ranks is appropriate shall, for the purpose of calculating the said composite rate, be treated as reduced by the amount of the excess, and
any award under Part IV of the Naval Order as applied by this Scheme shall be at a rate calculated by reference only to the higher or highest of those different relevant ranks.