yes and no.u need to have a good reason for selling and buying...

yes and no.
u need to have a good reason for selling and buying back. if u sell hoping to buy back at a lower price then u can do so. if you are jus doing it to crystalise a loss for tax purposes then technically u cant. but no ones stopping you from saying that markets are going to fall further and prices will get lower thus substantiating the statement.
but its past the sell down date of 30/6/08 anyway? why bother now unless u think markets will continue to fall until past 30/6/09.

milesg would know the full law on it.