Final answer:
The statement is true; real estate ethics require disclosure in writing of any commission reduction to all buyers who have made a written offer.
Step-by-step explanation:
The Code of Ethics in the real estate industry does indeed require disclosure of any commission arrangements that might affect a seller's decision to accept an offer.
When there is a commission reduction, the listing Salesperson is obligated to inform all buyers who have submitted a written offer about the details and terms of the commission reduction agreement in writing. The statement given in the question is true.