A.
Real property in the Town of Clay owned by one or more persons, each of whom is 65 years of age or over, or real property owned by husband and wife, one of whom is 65 years of age or over, shall be exempt from taxation by the Town to the extent of 50% of the assessed valuation thereof. Such exemption shall be computed after all other partial exemptions allowed by law have been subtracted from the total amount assessed.
B.
The real property tax exemption on real property owned by husband and wife, one of whom is 65 years of age or over, once granted, shall not be rescinded by the Town solely because of the death of the older spouse so long as the surviving spouse is at least 62 years of age.