IPv6 Question flipping the 7th bit conversions

I'm asking this question to clear up my own insanity, because it just dawned on me while reading deeper into frames bits. My question is the reason you have to flip the bit in the 7th bit when converting an IPv6 address using the Mac address, because that bit is the U/L bit and in the U/L bit a 1 means that it was administratively assigned, instead of a 0 which meant that the address was vendor assigned?

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Received on Wed Dec 26 2012 - 01:39:02 ART