As I understand it, the 14 day rule is for the first draw down. It's to allow background checks to ensure its not money laundering (I think). Once that step has passed, I assume the balance of funds (reflecting donations post 14 days) can be withdrawn as and when. So could run for as long as wanted, but with a max of 1 year. I have emailed JG but their response times are sloooooowwwww