What are the attire rules for gymnasts, and who applies the penalty?

FIG Women's Artistic Code of Points 2025-2028, section 2.3.2. Gymnasts must:

• wear a correct, non-transparent, elegant leotard or unitard (full-length legs allowed), optionally with full leg coverings in the same colour;
• keep the neckline no lower than half the sternum at the front and the lower line of the shoulder blades at the back, with straps at least 4 cm wide;
• keep the leg cut no higher than the hip bone, and the leotard leg no longer than 2 cm below the base of the buttocks;
• wear the bib number supplied (it may be removed only on approved request for back spins on beam and floor, and shown to the D-panel first);
• wear national identification and only permitted logos and advertising;
• keep handguards, bandages and wraps secure and in good repair; bandages beige or skin-coloured where available;
• not wear jewellery except small stud earrings, and no compression sleeves or socks, hip or other padding, or face paint (make-up must be modest).
  Slippers and/or socks are optional. Team members must wear identical leotards in qualification and team final.

Who penalises: attire and behaviour violations are deducted from the Final Score by the Chair of the Superior Jury, when notified by the D-panel, not by the E-panel (section 2.4).