Sorry to bring up a subject that has been discussed at length, but I may not be finding a specific answer for this. Trying to limit answer for specific category of aircraft. Part 135 Operation with "small non-transport category aircraft" - BE-200, 7 passenger seats, 2 crew. Applicable regulations (I believe) - 135.181, .183, .399 and 91.9, .103. Do the publication of Accelerate-Stop AND Accelerate-Go (one engine inop) performance data become "operating limtations" according to 91.9 and "take-off and landing distance data" according to 91.103. If answer is yes, obviously Part 91 vs 135 is irrevalent. Part 135.399 references "take-off WEIGHT limitations in AFM". Does this mean every chart that references weight in take-off calculations - whether 2 eng. or 1 eng. inop. has to be considered? We do reference a weight limitation on our load manifest in reference to 135.181 and BE-200 chart "Maximum Enroute Weight". I have trouble reading 135.399 due to the reference to 135.169(b)(2-6) which appears to apply to seating configurations of 10 seats or more (NA to our BE-200), but also says "or equivalent for operations under this part". Part 135.365-.398 appear to be much more specific for the performance requirements. If Accelerate-Go performance in particular is a limitation then BE-200s would require a minimum of 5500' at SL in summer (35*C) at MTOGW flaps 40% and many operators are violating this (while allowing a PC-12 to go). A late model BE-58 by comparison would be severely limited - about 7500' in this situation - but older light twins with no published Accel-Go data would not be as limited. Our training provider, of course, tests us on Accel-Go as a limitation for T/O. They also make reference to considering a % of a "usable clearway" in the calculation as stated on the chart - where is clearway (as defined in Part 1.1) information for a particular airport listed? Of course one is likely to reference 91.103 as the catch all for making decisions "with all available information". What is the consensus without considering accident aftermath lawyers? What am I missing?