What if AIMR decides that my work experience is irrelevant to what is required to obtain a CFA charter?
While that is theoretically possible, I have never know somebody who has not been awarded a charter due to deficiencies in his or her work experience. There are a wide range of activities that the CFA Institute deems to be acceptable work experience. http://www.cfainstitute.org/cfaprogram/workexperience.