IIRC, that is explained in the SEC filing posted earler in this thread.
IIRC, the nswer is "yes", but you'd better check.
EDIT: However, that holds for new shares issued by Greyscale to the high-level brokers. As I understood, those shares will be tradeable immediately, they only cannot be returned to Greyscale. So the individual investors who bought shares from brokers will not have to worry about that. It affects only those individuals who bought directly from SecondMarket in the past
Well, the whole fund is basically created using a loophole, isn't it? I guess it's just things we have to deal with until a 'real' ETF comes around. Better than nothing, I guess