This black-and-white robe is specially crafted to help the wearer regulate the flow of ki in his body, allowing for the generation of internal strength. Once per round when the wearer spends a ki point, he gains a +1 natural armor bonus to AC and a +1 enhancement bonus to Strength for 1 round. If the wearer spends another ki point before the end of his next turn, the duration is extended by 1 round and the natural armor and enhancement bonuses are increased by 1 (to a maximum of +4). The bonuses to AC and Strength last for only 1 round following the expenditure of the last ki point.
Under Ninja ki pool and ninja tricks as well as Monk ki pool the ability works on the word "by" as in by spending 1 point from the ki pool, a monk can do x.
This item says "when". When the wearer spends a ki point. Do you think i'm correct in assuming that whenever you use ki points for other abilities this robe activates?