correct - the reason is because the main gist of Brett's paper (as opposed to what i call "true" kelly betting) is that the player wants to fix his maximum bet and minimize his N0. the frequencies play a part in determining where that max bet is placed and are also used to calculate N0. in fact, though, for a fixed max bet, the brett's method should generate the same result as the kelly optimal method published by yamashita, which should also require TC frequencies. TRUE kelly betting in proportion to the advantage, without fixing a max bet, does not need TC frequencies. generally, though, in CVCX and other software, you have to fix a max bet and as such they use the frequencies.
again, note that these frequencies are the TC frequencies that YOU experience, not that the table experiences. what i mean is, if you just stand behind a table and watch the shoe but never jump in, you will get one set of TC frequencies. once you decide jump in though, you change the frequencies for each TC, and it is these adjusted frequencies that you must used when working with the fixed max bet formulas.