The social insurance register does exist. It was created in 1964, when the social insurance number was originally created. That does not change in this amendment. That is very much the status quo.
I don't have an exhaustive list here, but the information contained in that register is obviously the name, the address we sent the letter or card to, the date of birth, gender, and those sorts of pieces. As well, there a few administrative things, such as whether the person has been declared dead or whether they've not used it in several years. A lot of administrative flags are also in there.
That's the nature of the information in the register, and it has been for many years.