Doing this with the amplified version makes it easier to understand.

 

When used in this title [Title 26], where not otherwise [differently, in another way, in other respects] distinctly [readily distinguishable from all others, clearly defined] expressed [to set forth in words, to manifest or communicate as by a gesture] or manifestly [unmistakably, apparently, plainly] incompatible [Not capable of existing in harmony with something else] with the intent [aim or purpose] thereof— [of or concerning that or it; from or because of that]