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| Northern Natural Gas Demarcation Basis Swap |
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 | Non-Member Customer Initial |  |  |  | Member Customer Initial |  |  |  | Clearing Member and Customer Maintenance |  |  |  | Assessments Spot Month |  |  |  |
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 |  | Tier 1: $1,350 |  |  |  | Tier 1: $1,100 |  |  |  | Tier 1: $1,000 |  |  |  | N/A |  |  |
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 | Non-Member Customer Initial |  |  |  | Member Customer Initial |  |  |  | Clearing Member and Customer Maintenance |  |  |  | Assessments Spot Month |  |  |  |
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 |  | Tier 2: $1,215 |  |  |  | Tier 2: $990 |  |  |  | Tier 2: $900 |  |  |  | N/A |  |  |
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 | Non-Member Customer Initial |  |  |  | Member Customer Initial |  |  |  | Clearing Member and Customer Maintenance |  |  |  |
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 |  | Tier 3: $675 |  |  |  | Tier 3: $550 |  |  |  | Tier 3: $500 |  |  |
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 | Inter-Commodity Straddle Margin |  |  |  | |  |  |  |
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 |  | Tier 1 - Any Spread |  |  |  | $25 |  |  |
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NOTES:
| † | For cleared contracts, the spot month assessment is effective on the day submission deadline terminates. |
| | For traded contracts, the spot month assessment is effective as of the close of business one day prior to the last trading day. |
| * |
Tier 1: 1st and 2nd nearby month (spot month) |
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Tier 2: 3rd through 5th nearby month |
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Tier 3: Greater than 5th nearby month |
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