1. All burglary which is not burglary in the first degree or burglary in the second degree is burglary in the third degree. Burglary in the third degree is a class “D” felony, except as provided in subsection 2 . 2. Burglary in the third degree involving a burglary of an unoccupied motor vehicle or motor truck as defined in section 321.1 , or a vessel defined in section 462A.2 , is an aggravated misdemeanor for a first offense. A second or subsequent conviction under this subsection is punishable under subsection 1 . 3. For purposes of determining whether the person should register as a sex offender pursuant to the provisions of chapter 692A , the fact finder shall make a determination as provided in section 692A.126 . 92 Acts, ch 1231, §61 ; 2001 Acts, ch 165, §1 ; 2002 Acts, ch 1050, §53 ; 2010 Acts, ch 1104, §20, 23 Referred to in §692A.102 , 692A.126