The “Bonuses” tab allows you to activate unique clan bonuses using religious tractates. The maximum amount of active bonuses is defined by the number of Forts defending the Capital. All battle bonuses have a base duration of 1d 12h, while city development bonuses last for 10d 12h. You can increase this time by researching relevant clan technologies.

Note that in order to benefit from the bonus, your city needs to be located on the clan territory.