I got some of my reference letters in late 2013, when I was planning to apply for FSW - and then I discovered I needed an LMO (now LMIA) for that category at the time. I submitted them again in late 2014, when I qualified for CEC - but my application came back as over the cap. Now I have an ITA for FSW, and I wonder - have the reference letters expired? Do I have to get them again? Or can I just submit them, as they were for past jobs and nothing has changed?