leadcfa

In the question, A did not get just an occasional referral from B but had a policy of rewarding him for new clients. I left part of the text where B is described as a head hunter who meets lots of wealthy executives and directs them to the firm whera A works. It looks to me that this kind of policy should be brought into attention of his existing clients according to the standard.

One could interpret (a) so that 'all clients' refers to the whole firm and not just A and his clients. But this requires interpretation beyond what is said...