New boundaries of the RRab and RRc regions in the PA diagram defined by a sample of about 15 000 RR Lyrae stars that was randomly selected from the final RR Lyrae catalogue published in the dr3_vari_rrlyrae table of Gaia DR3. The dotted portion of the black line separating RRab from RRc stars was replaced by the broken red line in order to properly classify high-amplitude RRab stars with pulsation periods in the same domain as RRc stars (see text for details).