Evaluate the underlying constitutional reasoning for defining the republic specifically as a 'Union of States' instead of a 'Federation of States':
1. The terminology explicitly signifies that the national entity was not constructed through a voluntary treaty negotiated by pre-existing sovereign states.
2. The terminology enforces a strict legal barrier, permanently stripping regional states of any constitutional right to secede from the national apparatus.
3. The terminology serves to legally guarantee the perpetual territorial integrity and indestructible nature of all internal state borders.