exhibit 4. 2 series 2017 - 2 supplement dated as of february 21, 2017 to third amended and restated pooling and servicing agreement dated as of july 20, 2016 $ 804, 599, 000 american express credit account master trust series 2017 - 2 among american express receivables financing corporation iii llc american express receivables financing corporation iv llc as transferors american express travel related services company, inc. as servicer and the bank of new york mellon as trustee on behalf of the series 2017 - 2 certificateholders table of contents page article i creation of the series 2017 - 2 certificates 1 section 1. 01. designation 1 article ii definitions 2 section 2. 01. definitions 2 article iii servicing fee 15 section 3. 01. servicing compensation 15 article iv rights of series 2017 - 2 certificateholders and allocation and application of collections 16 section 4. 01. collections and allocations 16 section 4. 02. determination of monthly interest 18 section 4. 03. principal funding account ; controlled accumulation period 20 section 4. 04. required amount 21 section 4. 05. application of class a available funds, class b available funds, collateral available funds and available principal collections 22 section 4. 06. defaulted amounts ; investor charge - offs 24 section 4. 07. excess spread ; excess finance charge collections 25 section 4. 08. reallocated principal collections 26 section 4. 09. excess finance charge collections 27 section 4. 10. reallocated investor finance charge collections 28 section 4. 11. shared principal collections 29 section 4. 12. reserve account 29 section 4. 13. investment instructions 30 section 4. 14. determination of libor 31 article v distributions and reports to series 2017 - 2 certificateholders 32 section 5. 01. distributions 32 section 5. 02. reports and statements to series 2017 - 2 certificateholders 33 article vi pay - out events 33 section 6. 01. pay - out events 33 article vii optional repurchase ; series termination 35 section 7. 01. optional repurchase 35 section 7. 02. series termination 35 article viii final distributions 36 page article i creation of the series 2017 - 2 certificates 1 article i section 1. 01. designation 1 section 1. 01. article ii definitions 2 article ii section 2. 01. definitions 2 section 2. 01. article iii servicing fee 15 article iii section 3. 01. servicing compensation 15 section 3. 01. article iv rights of series 2017 - 2 certificateholders and allocation and application of collections 16