Here is states that if ACT is appropriate, then the individual is not eligible for CPST. If your CSB does not provide ACT and there aren't ACT private providers, to whom are you supposed to refer for ACT or does the individual get neither ACT nor CPST as a result?
For the limitation that only 1 hour of covered service per week be in the office, recommend striking the additional limitation that it must be for the benefit of the individual. For instance, it might be beneficial that the individual receive therapy in their home, but that may be an unrealistic burden for a provider who has office-based therapists.