Send to ERP's cutoffs, one row per rule as it was entered: cutoff_days is how many days before each location's own…

Send to ERP’s cutoffs, one row per rule as it was entered: cutoff_days is how many days before each location’s own today its bills are held back, and sites lists the rule’s locations with their timezone, local_today and cutoff_date, the last day a bill sent now could end on. A location in no rule has no cutoff, and every bill of it that may be sent is sent.