| Letter Circular No. | Title |
| Letter Circular No. 2023-12 | List of Submitting Entities in Production as of 29 December 2023 |
| Letter Circular No. 2023-11 | List of Submitting Entities in Production as of 30 November 2023 |
| Letter Circular No. 2023-10 | List of Submitting Entities in Production as of 27 October 2023 |
| Letter Circular No. 2023-09 | List of Submitting Entities in Production as of 29 September 2023 |
| Letter Circular No. 2023-08 | List of Submitting Entities in Production as of 29 August 2023 |
| Letter Circular No. 2023-07 | List of Submitting Entities in Production as of 28 July 2023 |
| Letter Circular No. 2023-06 | List of Submitting Entities in Production as of 30 June 2023 |
| Letter Circular No. 2023-05 | List of Submitting Entities in Production as of 26 May 2023 |
| Letter Circular No. 2023-04 | List of Submitting Entities in Production as of 28 April 2023 |
| Letter Circular No. 2023-03 | List of Submitting Entities in Production as of 31 March 2023 |
| Letter Circular No. 2023-02 | List of Submitting Entities in Production as of 28 February 2023 |
| Letter Circular No. 2023-01 | List of Submitting Entities in Production as of 30 January 2023 |