The following provisions apply to payments by the department of transportation under this chapter:
The additional payment authorized by this section shall be made only to a displaced person who purchases and occupies a replacement dwelling, which is decent, safe, and sanitary, not later than the end of the one (1) year period beginning on the date on which the displaced person receives final payment of all costs of the acquired dwelling or moves from the acquired dwelling, whichever is later.
IC 8-23-17-12