So could letting another country use a state's territory for aggressive acts against a third state.

VOA: special.2010.06.21

India's seven to eight million pullers usually pay one-third of their earnings to the owner of a rickshaw to use it by the day.

VOA: special.2009.05.11

Let me use Darfur as an example. In south Darfur right now, they are only cultivating about a third of the arable land that they could be cultivating.

VOA: standard.2009.10.14