Changes to EGs and ESGs

Hi

We have some legislative changes to be made and as a consequence we need to change the current EGs and ESGs to fit in with these new changes.

Can someone give me heads up on the tables I should review when looking to make these changes for example:

T501 Employee Group

T501T Employee Group Names

T502T Marital Status Designators

T503 Employee Groups / Subgroups

T503K Employee subgroup

T503T Employee Subgroup Names

T503Z Country Assignment for Employee Group/Subg

and any other things we need to be aware of holliday calendars etc?

Anything else I need to look at, previous experiences would be helpful

Thanks

WB