This paper shows that conservation of ECE2 antisymmetry leads to the inference of a vacuum current density (20). The paper shows that this can be computed for any material A. Eqs (5) to (7) are used to compute the vector spin connection from any A, while rigorously conserving antisymmetry. It would be very interesting to graph a few examples of a vector spin connection and a vacuum current density from a few material potentials, for example A for a static magnetic field and A from a current loop, and the A inferred by Horst Eckardt for this paper. In general J and J(vac) can be computed from any material A using Eq. (11) and numerical integration. This is a great advance in understanding of energy from spacetime.