A. The declaration, any amendment thereof, any instrument by which the provisions of the Building Unit Ownership Act may be waived and every instrument affecting the property or any unit shall be entitled to be recorded. Neither the declaration nor any amendment thereof shall be valid unless duly recorded.
B. In addition to the records and indexes required to be maintained by the county clerk, the county clerk shall maintain an index whereby the record of each conveyance of a unit affected by the declaration, and the record of each conveyance of a unit contains a reference to the declaration of the building of which the unit is a part.