The Makah Tribe is a separate sovereign. We have a Treaty that confirms our sovereignty and self-determination. A big part of that sovereignty is that state laws do not apply to the Tribe and its territory. As a state law, I-502 could not and does not legalize marijuana within the Makah Reservation.
Like Makah law, federal law lists marijuana as a controlled substance and possessing, using, buying and selling it is a federal crime. On the Makah Reservation, every little bit of pot is illegal. Wherever, whenever, however.