A man’s will versus the law

There is an article in the ST on 24 Fri discussing the issue of LKY’s
will to demolish his house and not allow the state to acquire it as a
national heritage. Here is a case of whether the will of an individual
should take precedent over the law? Which is more important or carries
more weight? Can any individual write a will and expect it to be
honoured by the State, in this case the State