Here is the place I saw this usage:
(Paraphrase) Mr. A's refrain that Law L be invoked against dishonest and incompetent legislators presents an interesting case.
My dictionary tells me
(irrelevant) refrain ~ noun
1. the part of a song where a soloist is joined by a group of singers
refrain ~ verb
1. resist doing something
2. choose not to consume
My understanding tells me that Mr. A obviously wants to invoke Law L against these legislators, but the dictionary tells me that he is resisting it (himself?)
What am I missing here?