DTCC ASIC and MAS Rewrite Specifications v0.2


New release of DTCC ASIC and MAS Rewrite Specifications version 0.2


23 October 2023


Level of significance of change


Main points

DTCC has updated the specifications for ASIC and MAS Rewrite to match the business rules and XML schema which underpin the reporting logic. You are highly encouraged to use the latest specifications if you are working on the upcoming changes.

For MAS Rewrite, DTCC has released a new version of the Message Specifications based on the close-to-final amendments to the Securities and Futures (Reporting of Derivatives Contracts) Regulations (“SF(RDC)R”).

In order to facilitate implementation of the MAS Rewrite changes, DTCC has also published the MAS Usage Guidelines to supplement the Message Specifications.

How does this change my reporting?

The changes will impact ASIC and MAS OTC derivatives reporting with the following important Go-live dates:

  • ASIC Rewrite – October 21, 2024
  • MAS Rewrite – October 21, 2024

What do I need to do?

Preparation is required to understand the scope of change and implementation for ASIC and MAS Rewrite reporting. If you are not able to source all your data, you will need to start developing plans for how you will be able to populate the mandatory data. If you are using a service provider, you are advised to reach out to them to resolve any uncertainty.


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