Sec. 6. (a) The department shall issue a patent to an interested person after the interested person does the following:
(1) Fills in and improves the real property.
(2) Files with the commissioner of the department of environmental management evidence that the filling and improvement have been done.
(3) Pays to the treasurer of state one hundred dollars ($100) per acre for the real property filled in.
(b) The governor shall sign the patent.
(c) The seal of the state shall be affixed to the patent.