After the forum posted my inquiry, two people asked me to provide them with more information. Here is something I wrote on my blog.

NSC 13/3 has a date of May 6, 1949. That means the document was finalized just weeks after the Kuomintang gave up the mainland and headed for Taiwan. The document is a revision of NSC 13/2 (this document is available online at a Japanese government website).
That document has a date of October 7, 1948. Of course, NSC 13/2 is itself a revision of NSC 13/1, which has a date of September 24, 1948.
According to the first page of NSC 13/2, the difference between that document and the previous version is that paragraphs 5, 9, and 20 have been deleted. On the other hand, according to NSC 13/2, those paragraphs would be returned to the document at a later date. And, in fact, that is what happened. According to the first page of NSC 13/3, the difference between that document and NSC
13/2 was that those same three paragraphs had been reinstated, with one caveat. The NSC made some changes to paragraph 5 in NSC 13/3 when compared to NSC 13/1, apparently.

Paragraph 9 in NSC 13/3 has to do with the Far Eastern Commission. I'm not sure why America would remove and replace this paragraph.

Paragraph 20 has to do with Japanese Reparations.
According to NSC 13/3, America should do everything within its power to "secure acceptance by the other reparations claimant countries of the principle that the reparations question as a whole should be reduced to the status of a dead letter." Furthermore, according to the document, "there should be no further industrial reparations removals from Japan and no limitation on levels of Japanese peaceful productive capacity." So basically, according to this policy, Japan should have to pay no more reparations for the war and the world should impose no more limitations on the Japanese economy. This sounds great for Japan.
I assume that America adopted this policy as a reward to Japan after the Nationalists abandoned China. This is further proof that the Nationalists were on the same side as Japan and America created the Cold War to separate Japan and China.

Paragraph 5 has to do with Okinawa. According to NSC 13/3, America would do whatever necessary to maintain "long-term strategic control"
of Okinawa. I'm not sure why America would remove and then replace this paragraph after the Communists assumed power in China. Perhaps America would have adopted an even more sinister policy towards Okinawa had the Communists not won.

You can find a copy of NSC 13/3 and NSC 13/2 on my original blog post, which is located here.

http://chroniclesoftheendofhistory.blogspot.com/2011/08
/on-66th-anniversary-of-end-of-wwii.html

I do not have a copy of NSC 13/1, but I believe the document is essentially identical to NSC 13/3.

Mark Murata