vassal_revocation_tyranny_effect

vassal_revocation_tyranny_effect = { #Despite its name this is referenced when _retracting_ vassals.
	if = {
		limit = { exists = scope:use_strife_not_tyranny }
		# If you have revocation reason, we allow that.
		if = {
			limit = { has_revoke_title_reason = scope:recipient }
			consume_revoke_title_reason = scope:recipient
		}
		else_if = { #Admin liege revoking from admin vassal
			limit = {
				government_has_mechanic = administrative
				scope:recipient = {
				 	government_has_mechanic = administrative
				}
			}
		}
		else = { change_strife_opinion = major_strife_gain }
	}
	else_if = {
		limit = {
			vassal_revocation_is_tyrannical_trigger = { VASSAL = scope:recipient }
		}
		# Special Legitimacy loss if you're revoking without a reason
		if = {
			limit = { has_legitimacy = yes }
			add_legitimacy = minor_legitimacy_loss
		}
		add_tyranny = {
			value = revoke_vassal_tyranny_gain
			if = {
				limit = {
					scope:recipient = {
						is_imprisoned = yes
						NOT = { is_imprisoned_by = scope:puppet_or_actor }
					}
					NOT = {
						scope:puppet_or_actor = { has_revoke_title_reason = scope:recipient }
					}
				}
				multiply = 2
			}
		}
	}
	else_if = {
		limit = {
			has_revoke_title_reason = scope:recipient
		}
		custom_tooltip = IS_ALLOWED_TO_REVOKE_VASSAL_DESC
	}
	else_if = {
		limit = {
			rite = {
				OR = {
					rite_has_parameter = pluralism_righteous_revocation_tyranny_reduced
					rite_has_parameter = pluralism_fundamentalist_revocation_tyranny_minimal
				}
			}
			faith = {
				faith_hostility_level = {
					target = scope:recipient.faith
					value >= faith_hostile_level
				}
			}
		}
		if = {
			limit = {
				rite = { rite_has_parameter = pluralism_fundamentalist_revocation_tyranny_minimal }
				faith = {
					faith_hostility_level = {
						target = scope:recipient.faith
						value = faith_hostile_level
					}
				}
			}
			custom_tooltip = IS_ALLOWED_TO_REVOKE_HOSTILE_INFIDEL_VASSAL
		}
		else = {
			custom_tooltip = IS_ALLOWED_TO_REVOKE_EVIL_INFIDEL_VASSAL
		}
		every_vassal = {
			limit = {
				faith = scope:recipient.faith
			}
			custom = INFIDEL_REVOCATION_OPINION
			add_opinion = {
				modifier = angry_opinion
				target = scope:puppet_or_actor
				opinion = {
					value = revoke_vassal_tyranny_gain
					multiply = -1
				}
			}
		}
	}
}

As written in game/common/scripted_effects/00_interaction_effects.txt.