Simplify the following text for a Grade 9 native English-speaking person.
Original: In 1855 , Minnie Myrtle observed that no Iroquois treaty was binding unless it was ratified by 75 % of the male voters and 75 % of the mothers of the nation .
Simplified: In 1855 , Minnie Myrtle saw that no Iroquois treaty came into effect unless it was approved by 75 % of the male voters and 75 % of the mothers of the nation .