I believe that history will show after the vote is taken in the House of Commons, that those who for whatever reason vote against this treaty will in 25 or 30 years from now be judged by the Canadian people, that while their opinions may have been right or wrong, they were on the wrong side in opposing this treaty.
The vote for the treaty is between 25 and 30 years old. 
In the context of the prompt, the vote is happening right now, not between 25 and 30 years in the past. 
( z1 vote :ARG1 ( z2 treaty ) :age ( z3 between :op ( z4 temporal-quantity :quant 25 :unit ( z5 year ) ) :op ( z6 temporal-quantity :quant 30 :unit ( z7 year ) ) ) )