Iowa Code § 554.13515: Acceptance of goods.

1. Acceptance of goods occurs after the lessee has had a reasonable opportunity to inspect the goods and

a. the lessee signifies or acts with respect to the goods in a manner that signifies to the lessor or the supplier that the goods are conforming or that the lessee will take or retain them in spite of their nonconformity; or

b. the lessee fails to make an effective rejection of the goods (section 554.13509, subsection 2).

2. Acceptance of a part of any commercial unit is acceptance of that entire unit.