petition_pos_grandeur_renown_effect

petition_pos_grandeur_renown_effect = {
	if = {
		limit = { petition_liege_medium_cost_trigger = yes }
		scope:petition_liege = { change_current_court_grandeur = minor_court_grandeur_gain }
	}
	else_if = {
		limit = { petition_liege_high_cost_trigger = yes }
		scope:petition_liege = { change_current_court_grandeur = medium_court_grandeur_gain }
	}
	if = {
		limit = {
			exists = scope:petition_vassal.dynasty
			scope:petition_liege.dynasty ?= scope:petition_vassal.dynasty
		}
		scope:petition_liege.dynasty ?= { add_dynasty_prestige = minor_dynasty_prestige_value }
	}
	else = {
		scope:petition_liege.dynasty ?= { add_dynasty_prestige = miniscule_dynasty_prestige_gain }
		scope:petition_vassal.dynasty ?= { add_dynasty_prestige = miniscule_dynasty_prestige_gain }
	}
}

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