Current Traffic Systems allow Affiliates to schedule the insertion of commercial advertising in either a Time-Based or Event-Based "window" format. Both Time-Based and Event-Based reservations are setup well in advance based on communication from the content provider as described in SCTE 118-1.

This document describes implementation requirements to achieve the functionality associated with Program-Specific Ad Insertion. Program-Specific Ad Insertion is the scheduling and insertion of a Spot into a digital broadcast Program based on the program identifier passed in the SCTE 35 Cue Message.

This document does not specify the source of the data that is required by the Traffic System. This data may be provided by the content provider or by a 3rd party (such as a network schedule aggregator, etc.). The data may be provided in its entirety, or a subset of the data may be provided and then manually supplemented.