Actually, as the White Paper says, STORS payment is renewed every 6 months. So, you'll receive the payment also beginning on month four, 5 and 6 for the first 50% and the remaining 50% will be paid out on 1st day of 7th month. IF you want to delegate for another 6 months, the STORS payment renews.

So, yes, it is passive accrual.