o9.0 Jihad
WHO IS OBLIGED TO FIGHT IN JIHAD
o9.4 Those called upon (O: to perform jihad when it is a communal obligation are every able bodied man who has reached puberty and is sane.
o9.5 The following may not fight in jihad:
(1) Someone in debt, unless his creditor gives him leave;
(2) or someone with at least one Muslim parent, until they give their permission; unless the Muslims are surrounded by the enemy, in which case it is permissible for them to fight without permission.
o9.6 It is offensive to conduct a military expedition against hostile non-Muslims without the caliph's permission (A: though if there is no caliph (def: o25), no permission is required).
o9.7 Muslims may not seek help from non-Muslims allies unless the Muslims are considerably outnumbered and the allies are of goodwill towards the Muslims.