Health Care Declaration

Can I revoke a Durable Power of Attorney, and how do I do it?
You have decided to revoke a person that you have appointed as your Durable Power of Attorney, for any number of reasons. Can a person revoke a Durable Power of Attorney, if so, how?
Can I appoint a Durable Power of Attorney while I can still manage my affairs?
I am still able to handle my own affairs but I would like someone to be my Durable Power of Attorney to run my affairs for me. Can I name someone as my Durable Power of Attorney that is effective though I am still able to handle my own affairs?
Who should I name as my Durable Power of Attorney?
You are in need of hiring a Durable Power of Attorney to help run your estate if you should become disabled. Who should I name as my Durable Power of Attorney and can I name more than one?
Should both spouses have Durable Power of Attorney for disability protection?
Both husband and wife own everything jointly. The question arises should they both seek Durable Power of Attorney should one be disabled. If so, will a spouse still be protected against things such as one of the spouses changing or naming a beneficiary to the life insurance policy, selling the jointly owned house or jointly owned stocks without the others permission. The other spouse would still need the rights to sign the checks and to pay bills or withdraw money from a joint banking account. Can the spouse sign checks and make withdrawals on the joint banking account if the other becomes disabled with Durable Power of Attorney? Would the spouse be able to make changes to the insurance policy, sell the jointly owned house or jointly owned stocks with Durable Power of Attorney should the other become disabled?
Are there filing requirements for advanced health care directive documents?
A person has completed a power of attorney for health care and a living will, but does not know if there are filing requirements or who should receive a copy of the documents. Are there filing requirements for advanced health care directive documents?