You can buy it only via Cash and SRS. According to the factsheet that I have, it still isn't CPF approved. Nowadays to be CPF approved you need to have a 'track record' and this fund just launched.
I still have some more 'balance' in my SRS allowance for this year to be invested. I will add this fund to my SRS holdings. Another advantage is the minimum investment of $100. This means that when I collect dividends from my other SRS stocks, I can immediately reinvest into this fund.