There is hereby levied a tax on mobile radio communication services as defined in Section 20.3 of Title 47 of the Code of Federal Regulations as in effect on June 1, 1999, at the same rate as the tax levied in Section 40-21-121, effective February 1, 2002. The Department of Revenue shall exercise its rulemaking authority to ensure that the application of this tax complies with all applicable federal laws and regulations.