Period spacing pattern in the inertial frame for {k = 0, m = 1} (above) and {k = −2, m = −1} (below) modes at Ω/Ω_K = 20% within the standard (red line) and the generalised (blue line) TAR frameworks. The bottom panel for each mode shows the differences with respect to the standard TAR period spacing pattern (the sudden fluctuations in the period spacing pattern are caused by the numerical noise which is introduced by the numerical derivatives of the mapping with respect to ζ and θ used in the resolution of the GLTE).