Alabama constitution
Article IX: representation
Section 201

Should any decennial census of the United States not be taken, or if when taken, the same, as to this state, be not full and satisfactory, the legislature shall have the power at its first session after the time shall have elapsed for the taking of said census, to provide for an enumeration of all the inhabitants of this state, upon which it shall be the duty of the legislature to make the apportionment of representatives and senators as provided for in this article.