Board Thread:Naruto Discussions/@comment-34700383-20180829185752/@comment-6769189-20180907235845

@combat: Not necessarily. Characters can use jutsu that were prepared by others. As seen in the manga, the two markings returned to Hagoromo and he was the one who activated the actual SPCT. All Naruto and Sasuke had to do was place the markings on Kaguya.