Structurally distinct definition
Structurally distinct means having a well-defined boundary. A "structurally distinct" part is one that can be visually delineated from its surroundings; it is a term that has a wider meaning than that of "part". The term "part" normally means something that can be assembled into, or separated from, a manufactured article, such as a toy. For example, a bicycle is composed of the following parts: frame, saddle, wheels, handle bars, chain, brakes etc. However, many of those parts are not homogeneous substances. For example, a bicycle saddle may contain both metals and plastics which cannot be easily separated. Nevertheless, the metal and plastic areas within that part would be visibly distinct (even if the part has to be cut in two to see them) and the metal and plastic regions within that part are considered to be the "structurally distinct parts" of that "part" of the toy.
Structurally distinct means, with respect to a given Compound as compared to another Compound, that such first Compound […***…].