How will the change to T+1 affect record date for a corporate actions, dividend payments, proxy votes, or annual meetings?

Standard settlement period for most currencies is 2 business days (Trade Date plus two business days: T+2), with some pairs such as USD.CAD settling the next business day (Trade Date plus one business days: T+1).

In order for a date to be a valid settlement date for a Forex transaction, the central banks for both currencies must be open for settlements. If either currency has a 'holiday' on the target settlement date, settlement is deferred until the next valid business day for both currencies. In addition, intervening holidays, that is a holiday between trade date and the standard 2 days later may or may not defer settlement, depending on which currencies are involved. Most currency transactions will not settle on a USD settlement holiday. This treatment is regardless of whether USD is part of the transaction directly, i.e. a EUR.JPY currency transaction will not settle on a USD settlement holiday but will be deferred to the next valid business day for all three currencies…

Forex Index Options traded on the PHLX settle trade date plus one business day (T+1) and are cash settled in USD. The Forex Future Options traded on the CME settle T+1 and deliver the underlying Forex Future contract…

If you are maintaining a settled short position in a U.S. security as of the close of business one business day prior to the Record Date (this is also one business day prior to the Ex-Dividend Date) you will be liable to the lender for the dividend. If you bought in the position thereafter, the trade would not settle in time for you to avoid that payment obligation…

A trade reported in TWS Time and Sales with code “C” has a same day settlement for cash ("Cash Sale"). Orders resting in an exchange's order book that have regular settlement (trade date plus 1 business day or T+1) are not entitled to trade with a price reported as code "C" to comply with reporting requirements…