Established in four classes (which totaled to 12 medals since every class has three grades) on July 2, 1943 by Decree No. 454.
Original text of Decree No. 454
第1條(警察獎章之頒給)
警察人員著有左列勞績之一者,得由內政部給與警察獎章:
一、辦理警察行政,於警察之建置及改進著有特殊成績者。
二、研究警察學術,於警察方面有特殊貢獻者。...