Upper panel: Ratio of the polarization peak times t_Pmax to light curve break times t_b as a function of normalized viewing angle q = θ_obs/θ_c for all steep jet structures considered in this work. We can see that these two times are within a factor of three from each other. Lower panel: Maximum polarization degree P_max as a function of the normalized viewing angle q = θ_obs/θ_c. The maximum polarization level shows an almost linear rising trend for small values of q (solid lines), which correspond to systems viewed from within their effective core opening angle θ_c,eff. This trends flattens out at larger values of q (dotted lines) when the system is viewed off-axis with respect to the effective core. The size of this effective core grows as the jet becomes shallower, marking a change in the value of q where this turnover occurs, q_c,eff.