Ok thanks. and this means that you need more then enough chakra to summon nine tails as is in the scan , so a normal Uchiha with not enough chakra cant summon it
That doesnt matter as long as they have it unlocked. And,i just remembered that Konoha was suspecting that Uchiha can control the kyuubi when Tobi attacked the village so i guess mangekyou sharingan isnt needed