A chapeau is not "just like another title basically". It's a lead-in, a phrase which acts as the grammatical start of a sentence which the following subsections finish. For instance, the text in the first paragraph of 18 U.S.C § 3632(a) which ends in an em-dash is a chapeau. Taking pride in work you have not done and not bothered to understand is perplexing.

Thank you that is a much better definition.