Our school has an application that puts users into an internet deny
group when they use up their allotted on-line credits. These are
successfully denied when the access rules are read following the
hourly ACLCHECK refresh. The trouble is, by then some users can get
to a very negative credit state before this happens. I have checked
on changing the default hourly refresh of ACLCHECK and have sourced
TID-2964147. Unfortunately this states that you can change the
refresh rate from 0 (/B0) to (/BXXX) hours.

Can we set the rate to intervals less than one hour?