Well this was an interesting read
From
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwiSrNiTotrLAhWFgYMKHUnsBkwQFggcMAA&url=https://www.icrc.org/casebook/doc/book-chapter/the-combatants-pow-book-chapter.htm&usg=AFQjCNFisn-uPC8_Bc0NeurCRvs9D5abMg&sig2=5ZegILlFaiQJnTeCelMu9Q&bvm=bv.117604692,d.amc
Quote
Combatants are members of armed forces. The main feature of their status in international armed conflicts is that they have the right to directly participate in hostilities. If they fall into enemy hands, they become prisoners of war who may not be punished for having directly participated in hostilities. It is often considered that customary law allows a detaining power to deny its own nationals prisoner-of-war status, even if they fall into its hands as members of enemy armed forces. In any event, such persons may be punished under domestic law for their mere participation in hostilities against their own country.
Combatants have an obligation to respect International Humanitarian Law (IHL), which includes distinguishing themselves from the civilian population. If they violate IHL they must be punished, but they do not lose their combatant status and, if captured by the enemy, remain entitled to prisoner-of-war status, except if they have violated their obligation to distinguish themselves.
Persons who have lost combatant status or never had it, but nevertheless directly participate in hostilities, may be referred to as "unprivileged combatants" – because they do not have the combatant's privilege to commit acts of hostility – or as "unlawful combatants" – because their acts of hostility are not permitted by IHL. The status of such persons has given rise to controversy.
Some argue that they must perforce be civilians. This argument is based on the letter of IHL treaties. In the conduct of hostilities,
Art. 50(1) of Protocol I defines civilians as all those who are not "referred to in
Article 4(A)(1), (2), (3) and (6) of the Third Convention and in
Article 43 of this Protocol". Once they have fallen into enemy hands,
Art. 4 of Convention IV defines as protected civilians all those who fulfil the nationality requirements and are not protected by Convention III. This would mean that any enemy who is not protected by Convention III falls under Convention IV.
Those who oppose that view argue that a person who does not fulfil the requirements for combatant status is an "unlawful combatant" and belongs to a third category. Like "lawful combatants", it is claimed, such "unlawful combatants" may be attacked until they surrender or are otherwise hors de combat and may be detained without judicial decision. The logic of this argument is that those who do not comply with the conditions set for a status should not be privileged compared to those who do.
Those who insist on the complementarity and exclusivity of combatant and civilian status reply that lawful combatants can be easily identified, based on objective criteria, which they will normally not deny (i.e. membership in the armed forces of a party to an international armed conflict), while the membership and past behaviour of unprivileged combatants and the future threat they represent can only be determined individually. As "civilians", unprivileged combatants may be attacked while they unlawfully directly participate in hostilities. If they fall into the power of the enemy, Convention IV does not bar their punishment for unlawful participation in hostilities. In addition, it permits administrative detention for imperative security reasons. From a teleological perspective, it is feared that the concept of "unlawful combatants", denied the protection of Convention IV, could constitute an easy escape category for detaining powers, as
the Geneva Conventions contain no rule about the treatment of someone who is neither a combatant nor a civilian
End Quote
Argo again Israel would be free to expel unprivaledged combatants. The requirement only being that detainees be delivered to the point of embarkation in good condition.
ICRC service