| Letter Circular No. | Title |
| Letter Circular No. 2020-09 | List of Submitting Entities in Production as of 29 December 2020 |
| Letter Circular No. 2020-08 | List of Additional Submitting Entities in Production as of 17 December 2020 |
| Letter Circular No. 2020-07 | List of Additional Submitting Entities in Production as of 22 October 2020 |
| Letter Circular No. 2020-06 | List of Additional Submitting Entities in Production as of 19 August 2020 |
| Letter Circular No. 2020-04 | List of Submitting Entities in Production as of 14 July 2020 |
| Letter Circular No. 2020-01 | List of Additional Submitting Entities in Production as of 25 March 2020 |