If there is a state law which says the living will is a "must follow" I'd sure love to see it. What articles I've seen about the role it plays in Florida is that it is "advice to the proxy."
ahhh you would ask for research:
765.1115 Falsification, forgery, or willful concealment, cancellation, or destruction of directive or revocation or amendment; penalties.--
(1) Any person who willfully conceals, cancels, defaces, obliterates, or damages an advance directive without the principal's consent or who falsifies or forges the revocation or amendment of an advance directive of another, and who thereby causes life-prolonging procedures to be utilized in contravention of the previously expressed intent of the principal, commits a felony of the third degree, punishable as provided in s. 775.082, s. 775.083, or s. 775.084.
(2) Any person who falsifies or forges the advance directive of another or who willfully conceals or withholds personal knowledge of the revocation of an advance directive, with the intent to cause a withholding or withdrawal of life-prolonging procedures contrary to the wishes of the principal, and who thereby because of such act directly causes life-prolonging procedures to be withheld or withdrawn and death to be hastened, commits a felony of the second degree, punishable as provided in s. 775.082, s. 775.083, or s. 775.084.
History.--s. 4, ch. 92-199; s. 31, ch. 99-331.
Note.--Former s. 765.310.
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765.110 Health care facilities and providers; discipline.--
(1) A health care facility, pursuant to Pub. L. No. 101-508, ss. 4206 and 4751, shall provide to each patient written information concerning the individual's rights concerning advance directives and the health care facility's policies respecting the implementation of such rights, and shall document in the patient's medical records whether or not the individual has executed an advance directive.
(2) A health care provider or health care facility may not require a patient to execute an advance directive or to execute a new advance directive using the facility's or provider's forms. The patient's advance directives shall travel with the patient as part of the patient's medical record.
(3) A health care provider or health care facility shall be subject to professional discipline and revocation of license or certification, and a fine of not more than $1,000 per incident, or both, if the health care provider or health care facility, as a condition of treatment or admission, requires an individual to execute or waive an advance directive.
(4) The Department of Elderly Affairs for hospices and, in consultation with the Department of Elderly Affairs, the Department of Health for health care providers; the Agency for Health Care Administration for hospitals, nursing homes, home health agencies, and health maintenance organizations; and the Department of Children and Family Services for facilities subject to part I of chapter 394 shall adopt rules to implement the provisions of the section.
History.--s. 2, ch. 92-199; s. 6, ch. 94-183; s. 243, ch. 94-218; s. 48, ch. 96-169; s. 284, ch. 99-8; s. 21, ch. 99-331.
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below I will post the entire chapter 765 of FL statutes from http://www.findlaw.com (it has all the states)