A certified interior designer shall pursue all professional endeavors with honesty, integrity, fairness, and professionalism. A certified interior designer may not initiate, participate, or engage in an activity that may reasonably result in interference in the performance by another certified interior designer of a contractual or professional relationship with a client or an unjust injury to another certified interior designer's reputation or business relationship. A certified interior designer shall only take credit for services performed by the certified interior designer directly, or by the certified interior designer's firm and under the certified interior designer's supervision or direction. A certified interior designer may not: Accept instructions from a client which the certified interior designer knows involve plagiarism; Consciously plagiarize work of another certified interior designer.