changes to T555y

Hello all,

Would a change to table T555Y trigger any retro?

I mean lets say T555y has a value

01 01 09 S1200 D1300 L3000

for 01012007 - 12319999

Now if we change it to

01 01 09 S1200 D1300 Z3000

Will this have any effect on retro?

Also, changing the processing type for the same time type, will that create a problem?

Chris