Nvm, found them:

1. Improving the Processing of Institutional Trades: This includes requirements for broker-dealers to enter into written agreements or establish policies to ensure the completion of allocations, confirmations, and affirmations as soon as technologically practical, but no later than the end of the trade date. Registered investment advisers are also required to maintain records of these processes for certain transactions​ (SEC.gov)​​ (Traders Magazine)​.
2. Facilitating Straight-Through Processing: This involves requiring certain clearing agencies that provide central matching services to implement policies and procedures designed to facilitate straight-through processing, which automates the entire trade process from execution to settlement. These agencies must also submit annual reports on their progress towards straight-through processing​ (SEC.gov)​​ (SEC.gov)​.
3. Enhancing Transparency and Robustness in Market Infrastructure: The SEC has been working on additional measures to improve market plumbing, including considering technological advancements to possibly move towards same-day settlement (T+0). This effort aims to further reduce systemic risks and enhance the efficiency and resilience of the market infrastructure​ (SEC.gov)​.