Tom Stafford, CFA, is a part of team within Appleton Investment Management (AIM) responsible for managing a pool of assets for Open Air Bank. AIM is recognized as a specialist in identifying investment opportunities in small-capitalization stocks. The firm's assets have grown rapidly in recent years, and to enhance liquidity, senior management recently made the decision to lift the maximum permissible market-cap ceiling from $ 500 million to $2 billion. At the same time, management changed the group responsible for selecting stocks to be added to the firm's "approved" list from individual portfolio managers to a committee consisting of the firm's chief investment officer and four senior portfolio managers. Has Stafford violated the Professional Conduct Standards relating to communication with clients and prospective clients if he doesn't notify his clients about the changes in the：（）

A.

B.

C.

下列不属于行政行为效力的是（）

A.确定力

B.拘束力

C.执行力

D.强制力