Hi Lorash,
most of us are not qualified to answer the question. Those who are will identify themselves, provided the thread gets bumped often enough to be seen when they're online.
You haven't yet made it apparent whether you stand to gain or lose from rectification of what might be termed "improper execution of a will".
Then again, perhaps you shouldn't, so that you obtain an unbiased answer?
:-)
Most of us have probably heard of "statute of limitations" but only in a context (TV!) where I do not know in which areas it is, or is not, applicable.
The thing is, if a 40-year-old will can be contested by a beneficiary then where is the line actually drawn? Are we going to be subjected to land-grab claims by our overseas cousins based on centuries-distant ancestors who got swindled in the same way?
I can't claim it as being "common sense" but I think it would be perfectly reasonable to assume that if an individual is named as a beneficiary in a will and is still alive to dispute it, then that will cannot be deemed to have been correctly and completely executed until all its beneficiaries agree that they have received what was specified to come to them.
In fewer words, 40 years should be no obstacle to the other set of grandchildren getting what was willed to them.
I have no idea whatsover of what the legal consequences of improper execution of a will would be, other than it probably constitutes fraud.