If asking me:
No, we need all hard lines together to have a minimum average days off. SWA lines are built to have on average per base, no more than 13 days work in a 30 day month and no more than 13.5 days in a 31 day month. Their hard lines have a minimum of 12 days off, but there are virtually no lines with 12 days off because for every one of them there has to be a line with 22 days off.