October 2013 ASU Text can be found in the Annex III of the Arrangement on Export Credits [TAD/PG(2013)11]
September 2011 ASU Text: the 2011 Sector Understanding on Export Credits for Civil Aircraft, [TAD/ASU(2011)1], which is included in the September 2011 text of the Arrangement, is applicable as of 1st September 2011.
2007 ASU Text: The 2007 Aircraft Sector Understanding [TAD/PG(2007)4/FINAL] is effective as of 1 July 2007.
All the texts: Aircraft Sector Understandings.
2011 ASU: Minimum Premium Rates (MPRs) are updated as a result of the reset of Risk Based Rates (on an annual basis) and the update of the Market Reflective Surcharge (on a quarterly basis) in accordance with Articles 26 and 31 of Appendix II of the ASU. The latest rates can be seen here: Quarterly Update of Market Reflective Surcharge (MRS) and Resulting Minimum Premium Rates (MPR) [2011 ASU].
The historical rates can be obtained in XLS format here: historical MPR and MRS.
2007 ASU: Minimum Premium Rates (MPRs) for Category 2 and 3 Aircraft are reset once a year. These reset MPRs replace Table 2 a) and Table 2 b) of Appendix III of the Aircraft Sector Understanding (2007 ASU) and can be seen here: Annual Reset of MPRs for CAT 2 and 3 Aircraft [2007 ASU]
The Margin benchmark shall be applied to all official financing support for export credits for civil aircraft pursuant to Article 8 of Appendix III of the 2011 Sector Understanding on Export Credits for Civil Aircraft (the 2011 ASU), annexed to the 2011 Arrangement for Officially Supported Export Credits (the Arrangement). The prevailing rates can be found here: Margin Benchmark for civil aircraft
The Historical rates can be obtained in XLS format here: Historical Margin Benchmark for civil aircraft.