tgp_domicile_conversion_when_changing_government_type

tgp_domicile_conversion_when_changing_government_type = {
	hidden_effect = {
		if = {
			limit = {
				any_held_title = {
					is_noble_family_title = yes
				}
				trigger_if = {
					limit = {
						has_domicile = yes #If we have a domicile we check its type
					}
					NOT = {
						domicile ?= {
							is_domicile_type = $NEW_DOMICILE_TYPE$
						}
					}
				}
				trigger_else = {
					has_domicile = no #If we do not have a domicile we need to still pass so we can add one
				}
			}
			random_held_title = {
				limit = {
					is_noble_family_title = yes
				}
				save_scope_as = old_nf_title
			}
			tgp_wipe_domicile_effect = yes
			if = {
				limit = {
					has_character_flag = new_government_is_byz_admin
				}
				give_noble_family_title = {
					name = noble_family_name
					tier = duchy
					article = DEFAULT_TITLE_NAME_ARTICLE
					government = $NEW_GOVERNMENT_TYPE$
					save_scope_as = new_title
				}
			}
			else = {
				give_noble_family_title = {
					name = noble_family_name
					tier = county
					article = DEFAULT_TITLE_NAME_ARTICLE
					government = $NEW_GOVERNMENT_TYPE$
					save_scope_as = new_title
				}
			}
			scope:new_title = {
				copy_title_history = scope:old_nf_title
			}
			destroy_title = scope:old_nf_title
			domicile ?= {
				set_up_domicile_estate_effect = yes
			}
		}
	}
}

As written in game/common/scripted_effects/10_dlc_tgp_scripted_effects.txt.