 Critics of the system suggest that rules for the use of DRS have created an inconsistency of approach to lbw decisions depending on the circumstances of the referral . Opponents also doubt that the ball @-@ tracking technology used in deciding lbws is reliable enough , but the ICC state that tests have shown the system to be 100 % accurate . The Board of Control for Cricket in India ( <unk> ) have consistently declined to use DRS in matches involving India owing to their concerns regarding the ball @-@ tracking technology . Early DRS trials were conducted during India matches , and several problems arose over lbws , particularly as the equipment was not as advanced as it later became . The <unk> believe the technology is unreliable and open to manipulation . 
