Ala. Code § 40-7-10
The tax assessor shall have the right and authority beginning October 1, 1951, and annually thereafter, to credit any person entitled to a statutory ad valorem exemption that the tax assessor has the authority and right to grant, and who has heretofore claimed such exemption, such statutory exemption, without such person claiming same annually. Any person who shall hereafter become entitled to such statutory exemption shall make a claim to the tax assessor between October 1 and prior to January 1 of any taxable year and, if such claim is allowed, shall not be required to annually thereafter repeat such claim. Any person who has claimed a homestead exemption and is entitled to same shall be annually credited with such exemption, and such homestead exemption shall encompass all additions or extensions made to the homestead structure or structures since the homestead exemption was claimed and shall encompass any additional buildings, being a part of the homestead, erected since the homestead exemption was claimed, any provision of the law to the contrary notwithstanding.
If on October 1 of any year any such exempted property shall have become subject to taxation, it shall be the duty of the person or persons who are liable for the tax on such property to notify the tax assessor between October 1 and prior to January 1 of that tax year that the property is no longer subject to exemption, and the tax assessor shall list the property for taxation. If the tax assessor discovers, at any time, that property so exempted is no longer entitled to exemption and such fact has not been reported to him as required above, he may list such property as an escape in accordance with the procedure pertaining to escaped taxes in this title.
Ala. Code § 40-7-10 (1975)