The self-consistent impedance method has been shown to accurately model media with inclined, complex permittivity using the Euler rotation of the inverse complex permittivity tensor. The resultant complex permittivity tensor is diagonally symmetrical so the solutions are valid for groundwave propagation since reciprocity is satisfied. These results are important for high frequency geophysical techniques (e.g.. radio magnetotellurics, ground penetrating radar). Other suggested uses of the self-consistent impedance method include the modeling of transmission lines on active anisotropic, dielectric substrates at higher frequency regimes.