The following provisions apply to this Article:
(1) The exemptions and refunds allowed in Article 5 of this Chapter do not apply except to sales that the State cannot constitutionally tax.
(2) The tax imposed by this Article does not apply to for-hire ground transport service provided by a for-hire ground transport service provider as public transportation on behalf of a State agency, a governmental entity listed in G.S. 105-164.14(c), or a local board of education.