So there was no general requirement to mail notice to all property holders. That language specifies that any party wanting the 10 day advance notice must have previously requested it. It also goes on to say that the lack of such notice does not constitute a valid objection to the proceedings anyways.
Barring some other guidance that isn't included in those sections, I don't see how the mailing of notice or lack thereof has any bearing whatsoever on anything done by the prior board. They were only "required" (in quotations since it's a toothless requirement) to mail notice to parties who specifically requested it, and failing to do so has no effect.
To put it in casual language, that essentially says, "Hey, make a list of anyone who asks for notice. If you're doing something, send notice to the people on the list. But if you don't mail them notice, or even if you don't ever keep a list of names at all, oh well, it doesn't matter in the slightest."