I wish I could, but language is not my domain. I hope somebody reading this can help. All I can say for sure, is that 9.6 is mathematical and efficient, but NOT INCLUSIVE.
9.6. To restart a stall count “at maximum n”, where “n” is determined by 9.5.2, 9.5.4, or 20.3.6, means the following:
9.6.1. If “x” is the last agreed number fully uttered prior to the call, then the stall count resumes at “Stalling (x plus one)” or “Stalling n”, whichever of those two numbers is lower