(b) In addition to the exemption provided in subsection (a) of this section and subject to the provisions of section eleven-c, article five, chapter nine of this code, effective the first day of July, one thousand nine hundred ninety-six, a homestead shall be exempt up to the value of seven thousand five hundred dollars from all debts and liabilities for hospital or medical expenses incurred from a catastrophic illness or injury. For purposes of this section, "catastrophic illness or injury" means a medically verified illness or injury for which any insurance or otherapplicable benefits have been exhausted, and which incapacitates and creates a financial hardship upon the debtor, his or her spouse or sibling or dependent of the debtor, who uses the homestead as a principal home at the time the debt was incurred. The exemption provided by this section shall expire upon the date of the death of the debtor, the death of the debtor's spouse or the death of a disabled dependent of the debtor who uses the homestead as a principal home, whichever is the later. The exemption provided pursuant to this subsection by operation of law shall not render the homestead exempt from liens and all other debts and liabilities contracted and incurred prior to the first day of July, one thousand nine hundred ninety-six.
The tax commissioner shall propose for promulgation legislative rules, not inconsistent with this section, in accordance with the provisions of article three, chapter twenty-nine-a of this code, to establish the procedures for exempting homesteads from debts and liabilities incurred from a catastrophic illness or injury.