USADA maintains a group of elite athletes as part of its registered testing pool (RTP). Consistent with the WADA Code, athletes in this pool are subject to strict whereabouts requirements in which they must inform the organization of their whereabouts (specific locations) at all times so they can be located for no-notice testing. Critics of WADA Code whereabouts requirements have criticized the requirement as overly strict, while proponents claim the requirement ensure athletes cannot evade tests and take advantage of testing gaps.