notwithstanding the provisions of section 3 -lrb- `` modification of these terms '' -rrb- , if airbnb changes this section 19 -lrb- `` dispute resolution and arbitration agreement '' -rrb- after the date you last accepted these terms -lrb- or accepted any subsequent changes to these terms -rrb- , you may reject any such change by sending us written notice -lrb- including by email -rrb- within thirty -lrb- 30 -rrb- days of the date such change became effective , as indicated in the `` last updated '' date above or in the date of airbnb 's email to you notifying you of such change .