An owner of a 529 account is allowed 2 asset reallocations per year - can these allocations have a duration attached where there are systematic and incremental movements from one asset class to another over a period of time and still count as 1 reallocation - as example, someone wants to move from age based aggressive to age based conservative but slowly over 12 months - so can 1/12 of the asset move once a month and still count as 1 reallocation?