Iowa Code § 572.14
Except as provided in section 572.13B, payment to the general contractor or owner-builder of any part or all of the contract price of the building or improvement within ninety days after the date on which the last of the materials was furnished or the last of the labor was performed by a subcontractor, does not relieve the owner from liability to the subcontractor for the full value of any material furnished or labor performed upon the building, land, or improvement if the subcontractor posts a lien within ninety days after the date on which the last of the materials was furnished or the last of the labor was performed.
Iowa Code § 572.14
87 Acts, ch 79, §6; 98 Acts, ch 1142, §3; 2007 Acts, ch 83, §10; 2012 Acts, ch 1105, §11, 27, 28; 2012 Acts, ch 1138, §13