In this subchapter:
(1) "Communist" means a person who commits an act reasonably calculated to further the overthrow of the government:
(A) by force or violence; or
(B) by unlawful or unconstitutional means and replace it with a communist government.
(2) "Department" means the Department of Public Safety of the State of Texas.
(3) "Government" means the government of this state or any of its political subdivisions.