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Ministry of Defense Rank Flags (Taiwan)

Taiwan

image by Akira Oyo, 20 March 2014
Source: Ministry of Defense website

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Overview

I found the flag of Minister of National Defense revised in 1958 was different from what we see today, while the flag of Chief of General Staff of Defense was the same with what we see today. And the flag of Vice-Minister of National Defense revised in 1958 was also different, although it was abolished in 1986. So, do you know in which year the design of these military flags were revised after 1964 and before 1985?
Besides, the flag of ROC Navy Honor Guard you posted in 2004 is identical to the Army flag except the blue rectangle. But recently the flag of ROC Navy Honor Guard follows design of the Act of Ensign of the ROC Armed Forces.
So, I wonder that if you ever saw they flew this flag or if there is a photo recorded such a flag?
Akira Oyo, 09 March 2014

From the Wikipedia page the white flags of Minister of National Defense (國防部部長旗), Chief of General Staff of the Armed Forces (參謀總長旗), Deputy Minister of National Defense (國防部次長旗), and Deputy Chief of General Staff of the Armed Forces (參謀次長旗) were adopted by the Naval Flags Act of 1950.
The white flag of Vice Chief of General Staff of the Armed Forces (副參謀總長旗) was adopted by the Naval Flags Act amendment of 1952.
These were officially replaced by the orange flags of Minister of National Defense (國防部部長旗) and Chief of General Staff of the Armed Forces (參謀總長旗) adopted by the Armed Forces Flags Act of 1985. However these two flags have been in use a long time before that - I do not have the exact time, but probably since 1960 - even the draft of the Armed Forces Flags Act of 1985 acknowledged the fact that the old Naval Flags Act (and that of the Army and the Air Force) were hopelessly outdated.
I now believe the flags of Vice-Minister of Defense and Deputy Chief of General Staff of Defense have never existed.
The Army-style Navy Honor Guard flag was used until 1990 (except in 1988, when all three Honor Guard flags were replaced by normal Unit Flags 單位旗 of the three services). Since 1991 the Navy Honor Guard flag has the same design as the Navy unit flag.
Miles Li, 09 March 2014

All the flags on the Wikipedia page you mentioned are 100% accurate because all of them are drawn according to the official documents, and all the sources can be found in the file information.
Akira Oyo, 09 March 2014

At beginning, the rank flags of the Ministry of National Defense were released on the Government Gazette on Sept. 15, 1947 and later instituted and revised as an appendix to the Act of Ensigns of the Republic of China Navy.
On Sept. 6, 1958, the revision of all the rank flags were approved by President Chiang Kai-shek, without law-making procedure. Then, the military authorities released the revision to the troops. They also published "the Illustration of the Ensigns of the Republic of China Armed Forces" in 1959 and 1964 to the troops. In the books, the flag of the Vice-Minister of Defense was the same with this one.
The Act of the Ensigns of the Republic of China Armed Forces was instituted on Dec. 17, 1985 and adopted on Jan. 3rd, 1986 to replace the Act of Ensigns of the Republic of China Navy, the Act of Ensigns of the Republic of China Army, and the Act of Ensigns of the Republic of China Air Force. In this new Act, most rank flags of the Ministry of National Defense were deleted, except the Minister's and the Chief of General Staff's, and the Minister's was revised as what we see today.
After Sept. 6, 1958, the Vice-Minister's flag was never revised.
Actually, since 1947 to 1958 and after 1986, the difference between the flags of the Minister and of the Chief of General Staff (Vice- and Deputy- included) is only the color of the logo.
Akira Oyo, 14 May 2014