decentralized_rule_removal_effect

decentralized_rule_removal_effect = {
	if = {
		limit = {
			dynasty ?= {
				has_dynasty_perk = fp1_adventure_legacy_5
			}
		}

		every_relation = {
			type = friend
			add_to_temporary_list = decentralized_rule_friends
		}
		every_relation = {
			type = best_friend
			add_to_temporary_list = decentralized_rule_friends
		}

		if = {
			limit = {
				exists = var:decentralized_rule_perk_value
				save_temporary_scope_as = affected_friend
				var:decentralized_rule_perk_value <= decentralized_rule_max
				var:decentralized_rule_perk_value > 0
				any_in_list = {
					list = decentralized_rule_friends
					count < var:decentralized_rule_perk_value
					NOT = { has_character_flag = about_to_die_but_not_dead_yet_flag  }
				}
			}
			
			if = {
				limit = {
					has_character_modifier = decentralized_rule_perk_modifier
				}
				remove_character_modifier = decentralized_rule_perk_modifier
			}
		
			change_variable = {
				name = decentralized_rule_perk_value
				subtract = 1
			}
		}
	}
}

As written in game/common/scripted_effects/01_dlc_fp1_scripted_effects.txt.