When ONDCP reasonably believes that a requester or a group of requesters acting in concert is attempting to divide a single request into a series of requests for the purpose of avoiding fees, the Agency may aggregate those requests and charge accordingly. The Agency may presume that multiple requests of this type made within a 30-day period have been made in order to avoid fees. For requests separated by a longer period, ONDCP will aggregate them only where there is a reasonable basis for determining that aggregation is warranted in view of all the circumstances involved. Multiple requests involving unrelated matters cannot be aggregated.