The Department is the central depository for all land use plans and all amendments and revisions to land use plans adopted by: a unit of the State government; a unit of a regional government; a unit of a local government; or an interstate agency. Each unit of government or agency listed in subsection (a) of this section shall submit to the Department a current version of all adopted land use plans and all adopted amendments and revisions to land use plans. The Department shall post on its website a copy of all adopted land use plans and all adopted amendments and revisions to land use plans that are submitted to the Department under this section in an electronic format.