Notice requirements of a subsequent meeting when quorum is not reached

These are how the covenants read in regards to special assessments and the meeting to vote for it:

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Section 4. Special Assessments for Capital Improvements [abbreviated]
...the Association may levy in any assessment year a uniform special assessment...
..., provided that any such assessment shall have the assent of two-thirds (2/3) of the votes of each class of Members who are voting in person or by proxy at a meeting duly called for this purpose, of which shall be sent to all Members at least thirty (30) days in advance, and which set forth the purpose of the meeting.

Section 6. Quorum for any Action Authorized Under Sections 4 and 5.
The quorum required for any action authorized by Sections 4 and 5 of this Article V shall be as follows: At the first meeting called, as provided in Sections 4 and 5 of this Article V, the presence at the meeting of Members, or of proxies, entitled to cast sixty percent (60%) of all the votes of each class of membership shall constitute a quorum. If the required quorum is not forthcoming at any meeting, another meeting may be called, subject to the notice requirements set forth in Sections 4 and 5, and the required quorum at such subsequent meeting shall be one-half (1/2) of the required quorum at the preceding meeting, provided that such subsequent meeting shall not be held more than sixty (60) days following the preceding meeting.
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Here is the letter they sent to notify homeowners of the meeting to vote for assessment (abbreviated)

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...In case a quorum is not reached during our first vote on January 11th, we will hold addition meetings for subsequent voting until a quorum is reach. All meetings will held at the [...] meeting room on the following schedule:
January 19 at 8 pm January 27 at 8 pm February 3 at 8 pm
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So, here's the issue/question:
The letter they sent did come by mail at least 30 days prior to the first meeting. But, note that it mentions dates for subsequent meetings should a quorum not be reached at a meeting. Three meetings have passed with no quorum reached; each time the board sent out only an email one or two days prior to the subsequent meeting saying that the quorum was not reached, and that the next meeting would be held. Can they do that? Section 6 reads "If the required quorum is not forthcoming at any meeting, another meeting may be called, subject to the notice requirements set forth in Sections 4 and 5". So,shouldn't they give another 30 day written notice for subsequent meetings?

Forgot to say the email should have been sent the next day instead of waiting a day or two before the next meeting - otherwise people wouldn't know whether they should come or not

Also, keep in mind the Section 6 you posted refers to both Section 4 and 5. You only posted information from Section 4. Therefore, the Section 5 may have information we are not aware of and which can affect your questions.

RE: " no one's crazy about the idea and know if enough people skip the meeting, it won't be held and no vote will be taken. "

There is definitely apathy on the part of home owners. However, I'm concerned that the board uses that as a tactic: based on the subsequent quorum reductions (1/2 of prior), the very last meeting only requires 18 members to be a quorum, and thus only 2/3rd of that to accept; thus as little as 12 'yes' votes could accept it. (there are about 275 eligible households).

I read it as 2/3 of the votes or proxies delivered to a meeting that quorum is present.

I believe that there is currently only one class of voters. When the developers originated the covenants (almost 50 years ago), I believe that they were considered the other class, but they went away after all houses were aquired. I can copy/paste that portion if you're really interested. (My main concern is with interpreting the requirements of notifications.)

The section states "...assent of two-thirds (2/3) of the votes of [] Members who are voting in person or by proxy...".
So, I think that that is pretty clear on who the "two-thirds" applies to - those "who are voting" - i.e the quorum.

And I also believe that "another meeting may be called, subject to the notice requirements set forth in Sections 4 and 5", clearly indicates that the same "notice requirements" need to be met for each subsequent meeting.

Keep in mind that a quorum is the minimal number needed to conduct business.

There can (and often are) more then the minimal number voting on hot issues.
Sometimes, there are not.

Dennis pointed out that Approval requires two-thirds (2/3) of the votes of each class of Members who are voting in person or by proxy at a meeting duly called for this purpose. Not 2/3 of a quorum.

Example: Development is 100 lots, quorum is 60, 40 lots are represented in person or by proxy at a meeting - Quorum not reached - vote can not happen.

If quorum is not reached, at the next meeting the quorum requirement is cut in half.
Hence: Development is 100 lots, quorum is now 30, 40 lots are represented in person or by proxy at a meeting, 35 votes are cast.

2/3 of membership is 66.6
2/3 of the quorum is 20
2/3 of members present is 26.6
2/3 of the votes cast is 23.3

Since approval is based on votes cast, there would need to be 24 yea votes in the above example to approve.

I've been involved in a similar situation.
However, our documents specified that the next meeting must be held within a specific time frame and a new notice be sent. This option was used when we increased assessments by 20% to fund the reserves.

Therefore, regardless if you support or oppose a measure, it's important to vote. Otherwise, depending on the wording of the governing docs (and using the above example) 24 people can make a decision that effect 100.