Offer Vassalage

base = -50
offer_vassalization_interaction_ai_acceptance_general = yes
modifier = {
	desc = obedient_interaction_reason
	trigger = {
		is_obedient_to = scope:actor
	}
	add = 20
}
modifier = {
	desc = tenet_love_thy_neighbour_boon_reason
	trigger = {
		scope:actor = {
			has_personal_tenet_flag = tenet_love_thy_neighbour_vassalage_acceptance
		}
	}
	add = 15
}
modifier = {
	desc = offer_vassalization_interaction_aibehavior_vassal_limit_tt
	trigger = {
		scope:actor = {
			vassal_limit_available < 1
		}
	}
	add = {
		value = -1000
	}
}
modifier = {
	desc = interaction_tribal_vs_nontribal
	trigger = {
		scope:recipient = {
			government_has_flag = government_is_tribal
		}
		scope:actor = {
			NOT = {
				government_has_flag = government_is_tribal
			}
		}
	}
	add = -20
}
modifier = {
	desc = interaction_nontribal_vs_tribal
	trigger = {
		scope:actor = {
			government_has_flag = government_is_tribal
		}
		scope:recipient = {
			NOT = {
				government_has_flag = government_is_tribal
			}
		}
	}
	add = -20
}
modifier = {
	desc = interaction_is_nomadic
	trigger = {
		scope:recipient = {
			government_has_flag = government_is_nomadic
		}
		scope:actor = {
			government_has_flag = government_is_nomadic
		}
	}
	add = -50
}
modifier = {
	desc = interaction_nomadic_vs_nonnomadic
	trigger = {
		scope:recipient = {
			government_has_flag = government_is_nomadic
		}
		scope:actor = {
			NOT = {
				government_has_flag = government_is_nomadic
			}
		}
	}
	add = -75
}
modifier = {
	desc = interaction_nonnomadic_vs_nomadic
	trigger = {
		scope:actor = {
			government_has_flag = government_is_nomadic
		}
		scope:recipient = {
			NOT = {
				government_has_flag = government_is_nomadic
			}
		}
	}
	add = -75
}
modifier = {
	desc = offer_vassalization_interaction_aibehavior_power_tt
	add = {
		value = 1
		subtract = {
			value = scope:recipient.max_military_strength
			divide = {
				value = scope:actor.current_military_strength
				min = 1
			}
		}
		multiply = 20
		ceiling = yes
	}
}
modifier = {
	desc = TAKE_THE_VOWS_AMBITIOUS
	trigger = {
		scope:recipient = {
			has_trait = ambitious
		}
	}
	add = -20
}
modifier = {
	desc = INTERACTION_PARANOID
	trigger = {
		scope:recipient = {
			has_trait = paranoid
		}
	}
	add = -20
}
modifier = {
	desc = INTERACTION_ARROGANT
	trigger = {
		scope:recipient = {
			has_trait = arrogant
		}
	}
	add = -20
}
modifier = {
	desc = INTERACTION_FICKLE
	trigger = {
		scope:recipient = {
			has_trait = fickle
		}
	}
	add = -10
}
modifier = {
	desc = INTERACTION_STUBBORN
	trigger = {
		scope:recipient = {
			has_trait = stubborn
		}
	}
	add = -10
}
modifier = {
	desc = TAKE_THE_VOWS_TRUSTING
	trigger = {
		scope:recipient = {
			has_trait = trusting
		}
	}
	add = 5
}
modifier = {
	desc = INTERACTION_CONTENT
	trigger = {
		scope:recipient = {
			has_trait = content
		}
	}
	add = 5
}
modifier = {
	add = 60
	scope:recipient = {
		government_has_flag = government_is_feudal
	}
	scope:religious_exemption = yes
	desc = CONTRACT_RELIGIOUS_EXEMPTION_REASON
}
modifier = {
	add = 30
	scope:recipient = {
		government_has_flag = government_is_clan
	}
	scope:religious_exemption_clan = yes
	desc = CONTRACT_RELIGIOUS_EXEMPTION_REASON
}
modifier = {
	add = 30
	scope:recipient = {
		government_has_flag = government_is_feudal
	}
	scope:low_obligations = yes
	desc = CONTRACT_LOW_TAXES_REASON
}
modifier = {
	add = -40
	scope:recipient = {
		government_has_flag = government_is_feudal
	}
	scope:high_obligations = yes
	desc = CONTRACT_HIGH_TAXES_REASON
}
modifier = {
	scope:recipient = {
		is_tributary_of = scope:actor
	}
	scope:actor = {
		government_has_flag = government_is_mandala
	}
	add = -35
	desc = is_tributary_of_me_mandala
}
modifier = {
	scope:recipient = {
		government_has_flag = government_is_mandala
	}
	scope:actor = {
		government_has_flag = government_is_mandala
	}
	add = -25
	desc = is_mandala_government
}
modifier = {
	scope:actor = {
		has_mandala_capital_trigger = yes
	}
	add = scope:actor.mandala_radiance_value
	desc = actor_positive_mandala_radiance
}
subject_realm_size_lose_weight_modifier = {
	DEVARAJA = scope:actor
	SUBJECT = scope:recipient
}
opinion_modifier = {
	trigger = {
		scope:actor = {
			government_has_flag = government_is_mandala
		}
	}
	who = scope:recipient
	opinion_target = scope:actor
	multiplier = 1
}

As written in game/common/character_interactions/00_character_interactions.txt.