Based on advice on a previous thread here, I've purchased multiple permits whenever my stay spanned a weekend or a holiday. In fact, I just purchased two permits since my most recent stay spanned the 4th of July. It was fine although it was purchased from the previous vendor. In the new terms and conditions, under "Weekend and Holiday Exception:", it states:

APLT (Airport / Long Term)
Consecutive Purchasing Prohibited

So, is anyone willing to risk purchasing multiple permits for a parking stay and posting here on their results? Or, should it be assumed that this behavior will now be cited? I don't think this language was in the previous terms and conditions.