“…In [8,9], a transition layer with rather a complex material struc ture is considered as an infinitely thin semitransparent capacitive sheet with special matching boundary con ditions for electromagnetic fields on the sheet. In [10,11], models of bilateral boundary conditions for a layer in the presence of currents uniformly distributed over the layer are developed and, in [12], boundary condi tions are derived with allowance for eddy and potential double layer surface currents. In the present work, we introduce additional electrodynamic parametersthe surface capacitance and inductance of the contact layer-and generalize the bilateral boundary condi tions for the transition layer.…”