For data reported at the configuration level, the rule requires different data elements to be collected for different configurations. For example, the rule does not require the reporting of annual fossil fuel based CO2 Emissions for single units using tier 1, tier 2, or tier 3 but does require it for aggregation of units and common pipe configurations. Similarly, annual CO2 emissions from sorbent is required for single units using tier 1, tier 2, or tier 3 and for aggregations of units but is not collected for common pipe configurations. These data collection pattern are summarized for each configuration option in Subpart C in the table below.
These data collection variations also have an impact in the way data is presented in summary report which is available after generating a submission. As many users have noted that the summary report includes data display areas which are not always populated with data. All units have the Emissions Detail data elements displayed (i.e., Annual CO2 emissions from sorbent, Total annual biogenic CO2 mass emissions, and Total annual CO2 mass emissions from fossil fuels) even if these data items are blank because that data was not collected. The 
in table below highlights the configurations for which the summary report presents a data element title and a blank in the emissions detail area.
| Table Head (th) |
|---|
Configuration types, Emission Numbers and their Presentation in the Summary Report |
