I was able to do it. But your only choices are the 1st or the 15th. I had to sign a paper. I was told about a fee that had to be paid...Nothing too major, $50 I think....but I never actually got charged the fee. It took a payment cycle or two to take effect.
But all I did was call member accounting and make the request... they mailed me the papers, I signed them, and then mailed them back.