Original sentence: Paragraph 47, chapter c states that vessels engaged in humanitarian missions and carrying supplies indispensable to the survival of civilian population are exempt from attack, on condition they were operating based on "agreement between the belligerent parties", but as yet authoritative legal sources have not indicated whether or not this was legally the case
Edited sentence: It also states (Paragraph 47, chapter c) that vessels engaged in humanitarian missions and carrying supplies indispensable to the survival of civilian population are exempt from attack, on condition they were operating based on "agreement between the belligerent parties"