[3] It appears that tawaf is like facing the Qibla in which "custom conformity" for the implementation of the Quranic verse «وَ لْيَطَّوَّفُوا» (you must circumambulate) is sufficient, so all body organs are not necessary to be within the tawaf boundary in such a way that if one's head or hand falls out of the periphery, it would be considered an invalidation of the circumambulation.
SWALI 47: Ikiwa ngozi ya mbuzi itawekwa kwenye maji ya chumvi, hali ya kuwa kafia panya kwenye maji hayo, itatwahirishwa vipi ngozi hiyo? JAWABU: ikiwa itafahamika ya kuwa umaji maji umeingia hadi ndani ya ngozi hiyo, haiwezekani kuitwahirisha ndani yake, na juu yake kutatwahirika kwa kuimwagia maji.