《统一商法典》的示范效应，集中体现在法典所遵循的专项原则。是法典的灵魂。这些原则主要有：灵活性原则，现代化原则，惯例、协议优位原则等。以下分别加以叙述。第一，灵活性原则。这一原则集中体现在第１－１０２条（１）开宗明义的规定：“本法应作灵活的解释和适用... The demonstration effect of the Uniform Commercial Code is embodied in the special principles followed by the Codex. It is the soul of the Code. These principles are mainly: the principle of flexibility, the principle of modernization, conventions, the principle of agreement superiority. The following are described. First, the principle of flexibility. This principle is embodied in Article 1-102 (1), which states that "This Law should be interpreted and applied flexibly ...