[summer]

Just how do you write this law that specifically sticks it's nose into the marriage contract ?

For starters, it's "its nose." And it doesn't intrude upon a marriage contract -- it would restore rights to a spouse incapacitated whose marriage has grounds for divorce. Should such a spouse have no right to speak to end such a marriage? Because that's the situation now. And I do think that's unfair.

[RS]

"-- it would restore rights to a spouse incapacitated whose marriage has grounds for divorce."

... and SOMEONE would have to have the authority to bring this to the court who would have to decide IF there were "grounds for divorce" ( and I think in most States simple incompatability is grounds for divorce these days )

IF this could even work, Guardianship of the incapacitated ( now single ) person does not somehow automatically revert to parents, a court would have to appoint a guardian, same as for any single person who is incapacitated.