valid_governor_contract_basic_trigger

valid_governor_contract_basic_trigger = {
	task_contract_taker = {
		#you have to be a governor
		trigger_if = {
			limit = {
				government_has_flag = government_is_celestial
			}
			is_governor_or_admin_count = yes
		}
		trigger_else = {
			is_governor = yes
		}
		#and the location has to be in your realm
		custom_tooltip = {
			text = task_contract_location_not_in_realm
			any_sub_realm_county = {
				any_county_province = {
					this = root.task_contract_location
				}
			}
		}
	}
}

As written in game/common/scripted_triggers/07_ep3_triggers.txt.