Determining amount of premium overpayments and underpayments

1. The amount of the health premium overpayment or underpayment must be determined by calculating the difference between the premium that was paid and the premium that should have been paid, retroactively to the month the change in premium should have occurred, or July of the earliest contract period still open, whichever is more recent. 2. The amount of the life premium overpayment or underpayment must be determined by calculating the difference between the premium that was paid and the premium that should have been paid, retroactively to the month the change in premium should have occurred, or the first day of the first month of the earliest contract period still open, whichever is more recent. 3. The amount of the dental premium overpayment or underpayment must be determined by calculating the difference between the premium that was paid and the premium that should have been paid, retroactively to the month the change in premium should have occurred, or the first day of the first month of the earliest contract period still open, whichever is more recent. 4. The amount of the vision premium overpayment or underpayment must be determined by calculating the difference between the premium that was paid and the premium that should have been paid, retroactively to the month the change in premium should have occurred, or the first day of the first month of the earliest contract period still open, whichever is more recent. 5. The amount of the employee assistance premium overpayment or underpayment must be determined by calculating the difference between the premium that was paid and the premium that should have been paid, retroactively to the month the change in premium should have occurred, or the first day of the first month of the earliest contract period still open, whichever is more recent.