If this rule, say, banned techniques like Kata Guruma, Morote Gari, etc. from competition, I would be opposed to it, but at least they're easy to apply. Here, they're allowed only if part of a series of 'Sincere' techniques or as counters. So let me give you two examples:
- Blue comes in for a hip throw, White manages to step around, cutting Blue's grip and then goes for a Te-Guruma
- Blue comes in for Seoinage, White Steps back to cut, and blue, realizing the opportunity grabs White's leg to execute Ko-Uchi-Makikomi.
In #1, the ref can see that White was trying to attack, and Blue is countering, but he can also say that Blue used White's failed attack as an excuse to execute an offensive Leg-Grab.
In #2, depending on how it plays out, the ref can either view the technique as a sincere second attack, or view the first attack as a 'False' attack, and therefore, disqualify Blue.
#1 actually happened at the Junior worlds in a Gold Medal match, and The player executing Te-Guruma was disqualified (he had done a 'less-sincere' Te guruma earlier, and had received a warning, but this attempt was clearly a counter).
I understand how the IJF wants to limit the wrestling-style Morote-Gari attacks, but at the same time, it can't do it without penalizing those who normally play stand-up Judo but are using these techniques as part of their extended repetoire.