Accretion regime L_BLR/L_Edd as a function of the radio power at 1.4 GHz. The three considered epochs (#1 as a blue square, #2 as an orange arrow, #3 as a green dot) of 5BZQ J1243+4043 are compared to the blazar samples analyzed in Paper PI (gray). The horizontal dotted and vertical dashed-dotted black lines represent the boundaries for the LERG/HERG-like behavior, respectively. As discussed in Sect. 3, despite the line emission variations, the object remains in the radiative-efficient regime.