《旧唐书·本纪·卷十二》
从打仗以来，方镇重任必定兼任御史台和中书省门下省长官，以至于外府官吏也兼带御史台和中书省门下省职衔。
自兵兴已来，方镇重任必兼台省长官，以至外府僚佐，亦带台省衔。
Since the war, the important posts in the Fangzhen must concurrently hold the posts of the Imperial Censors and the Sub-provincial Governors of the Zhongshu Province and the Menxia Province, to the extent that the officials outside the government also have both the titles of the Imperial Censors and the Sub-provincial Governors of the Zhongshu Province and Menxia Province.