Clotheslines in Mt. Lebanon?

And while I'm asking questions:

Are there any rules or regulations in Mt. Lebanon, or in any of its residential developments, that prohibit hanging clothes on clotheslines?

Again, I looked around the Municipality's website but found nothing.

The question is prompted by this front page story in the NY Times about ongoing clothesline battles in private communities and condo developments -- some of them not exactly "high end," to rely on a stereotype -- over clotheslines.