Thông tư số 52/2020/TT - BCA
01/03/21
https://file.hstatic.net/1000125203/file/thong_tu_52_ve_quy_chuan_004669565d63444fbcecddf4b555255a.pdf
https://file.hstatic.net/1000125203/file/thong_tu_52_ve_quy_chuan_004669565d63444fbcecddf4b555255a.pdf