This is the acceptable use policy for the time delay DAC.

• The time delay DAC is limited to four simultaneous connections per member, or group of related members. All the limits presented here are aggregated by subscriber.
  
• Queries can be sent to the time delay DAC without waiting for the previous query to return.  The time delay DAC will just queue the queries.
• The daily limit is set at 5x the number of domain names on tag PLUS 200x the highest monthly new registrations figure from the previous 12 months and is capped at 3 million daily queries. This figure is recalculated at midnight on the first day of the month.
  
• The daily limit is applied on a rolling 24 hour basis, recalculated every 5 minutes
• The maximum query rate is 1,000 queries per rolling 60 seconds recalculated every 5 seconds. If your daily limit is greater than 480,000 then your query rate is increased to 3x daily limit /1440
  
• If you exceed the query limits a block will be imposed. For further details regarding 'Blocks' please see the Instructions for Use page.