If a massage therapist invokes a therapist's "right of refusal" to give massage in a case where massage is contraindicated, which specific principle of massage therapy is upheld?

The MBLEx is a standardized certification exam produced by the Federation of State Massage Therapy Boards (United States) and is used by many states to license or certify massage therapists. The massage board exam covers these topics:
Anatomy & Physiology, Kinesiology, Pathology & Contraindications: Physiological Effects of Massage, Client Assessment,Ethics, Boundaries, Laws & Regulations and Guidelines for Professional Practice.