P₅ parameter plotted as a function of A₅ for the 40 surveyed GCs, with the blue circles referring to pre-CC systems and the red squares marking PCC clusters. The gray circles show the results from the Monte Carlo simulations of B24. The dashed lines mark the limits in A₅ and P₅ proposed by B24 as boundaries to separate pre-CC from PCC clusters. The solid lines mark the revised limits proposed here.