Enforcement Rules of the Orders Act Article 19

If more than two classes of orders are worn simultaneously, the orders shall be worn according to the classes of the order, and the same class of the orders shall be worn according to the sequence specified in Article 2 of this Act. When the Grand Cordon is worn, the location of the orders shall be determined according to order quantity, the order to be worn ahead shall be worn in the upper, right, or upper right part of the left side, and the order to be worn behind shall be worn in the lower, left, or lower left part of the left side. The Cordon shall be worn in the middle below the collar band successively in order from top to bottom. Two orders with Grand Cordon or the Cordon shall not be worn abreast, and only an order with front sequence shall be worn. The order with Ribbon shall be worn in a horizontal line from right to left, and in another line if they are not worn abreast.Other orders shall be next to the above orders, and medals and souvenir medals shall be next to the orders.
中文原文 勳章條例施行細則第19條
同時佩帶兩種以上之勳章於左襟,應依勳章等次之高低為序,等次相同者,照本條例第二條所列各種勳章之次序,定其先後,凡佩大綬勳章,須視勳章之大小多寡決定,其在襟上之位置,應列在先者,酌佩於左襟之上方或右方或右上方,應列在後者,酌佩於左襟之下方或左方或左下方,凡領綬勳章,應先上後下,以縱線聯綴佩於領下正中,兩大綬或兩領綬均不並佩,僅佩其序次在先者,凡襟綬勳章,應自右至左橫列一線,不能並容時,得另列次排。
受有其他勳章者,佩於前條所列舉同綬制勳章之次,獎章紀念章,應佩於勳章之次。

English translation for reference only; the Chinese text prevails. Not legal advice.