A type rating is a Type rating depending on which license your putting it on.
On an EASA licence you will get a full type rating with no restrictions. On your FAA your licence you will have all kinds of restrictions such as SIC only, no circling approaches...etc.
If this is your first multi crew type rating you will need a valid Multi engine IR.
If your already flying multi-crew and it states this on your license then that IR will need to be valid,(its automatically renewed with the LPC).