Are changes that are initialed and dated on a written Will valid?

Question Details: My husband and I have been married 30 years. I am 66 and he is 69. He has made numerous changes to his will by making hand-written notations on the original will, initialing them and dating them. We have not made it to the attorney yet because he had been tied up and has not been able to meet with us; also we are 100 miles away. I am anxious about this and he isn't because he feels that if something were to happen to him the changes would stand up since he has initialed and dated them. I disagree with him and have told him I don't think the changes mean a thing until they have at least been witnessed and notarized. Could you please advise me on this?

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