As part of annual compliance, a firm is reviewing its adherence to the CFA Institute's Asset Manager Code, specifically in the context of performance reporting. The firm has a robust process for reporting performance to clients, which includes various key performance indicators (KPIs). However, a recent audit revealed that the firm uses net-of-fee performance reporting for most clients but has inconsistently applied gross-of-fee reporting for larger institutional clients.
According to the Asset Manager Code, which of the following practices would be considered a violation related to performance reporting?