Polarization angle along the spine (left) and limbs (right) of the counterjet when viewed at high inclination. For a single spin, both the spine EVPA and the limb EVPA swing at roughly the same location; the prediction for this swing location (Equation (60)) is most accurate in the relativistic limit and is shown as a blue star. In the spine, the γ_∞ dependence is very weak, and in the limbs, the γ_∞ dependence is modest. The field line used for this plot is ψ = 0.15.