Replace the first sentence of rule 1.4 voting with “Any Commoner may cast his Vote on a Pending Proposal by making a comment on that entry using a voting icon of FOR, AGAINST, DEFERENTIAL, or ABSTAIN.”
To that rule, add the following:

Quorum is treated as one lower for the purposes of enacting or failing a given proposal for every Commoner who votes ABSTAIN on that proposal.

Replace

A vote of DEFERENTIAL is a vote of no opinion, or of faith in the decision of the Mad Prince. The vote will count as the same as the Mad Prince’s vote. If the Mad Prince casts a vote of DEFERENTIAL on a proposal, it serves the purpose of cancelling any previous vote on that proposal that was cast by the Mad Prince. If there is no Mad Prince, a vote of DEFERENTIAL counts as an explicit vote of abstention.

with

A vote of DEFERENTIAL is a vote of faith in the decision of the Mad Prince. The vote will count as the same as the Mad Prince’s vote. If the Mad Prince casts a vote of DEFERENTIAL on a proposal, it serves the purpose of cancelling any previous vote on that proposal that was cast by the Mad Prince. If there is no Mad Prince, a vote of DEFERENTIAL counts as a vote of ABSTAIN.