Importing Unit Specific Certificates – NEPOOL GIS

Responsibility of the GIS Importing Account Holder (through a NEPOOL Participant if the GIS Importing Account Holder is a Non-NEPOOL Participant)

Create an ISO-NE generator asset ID number for the GIS by utilizing the current asset ID number from the external control area and add a prefix of ’NY’ (New York), ’HQ’ (Hydro Quebec) or ’NB’ (New Brunswick) to the external control area asset ID number (e.g., NY123456).
Access the ISO-NE New England External Transaction Tool (NEXTT).
- Identify the import generator in the ISO’s NEXTT system when entering the External Transaction information.
  - In the Hourly Detail tab of the Retrieve eTag Data screen, click on the Options field to access optional options.
  - Select the box to the left of the “GIS” RT Options.
  - Enter the ISONE generator asset ID number and click OK
- Please see the NEXTT User Guide for more detailed instructions on how to use the NEXTT and the Create New Transaction from an eTag User Guide from ISONE Training for more information.
Access the Joint Energy Scheduling System (JESS)
- If you using the Joint Energy Scheduling System (JESS) hosted by NYISO to submit external transactions, input the ISO-NE generator asset ID in the GIS ID optional field, which is the same as the NEXTT GIS ID field.
- Please visit the JESS Training from ISONE Training for more information.

ISO-NE's Settlement Market System will capture the executed External Transaction in the creation of the NEPOOL monthly electronic data file that is sent to APX on a monthly basis to be loaded into the GIS system.

On a monthly basis, APX will receive the Asset I.D. number through the designated NEPOOL monthly electronic data file for each GIS Importing Account Holder and load the data into the Import Module for that GIS participant.

Please reach out to the GIS Administrator at gis@apx.com or call 408-899-3343 for assistance.

Please visit the Imports and Exports FAQ page for more information.