The regulation also provides that the medical practitioner must complete various procedures to ensure the identification of the blood sample: see reg 11(d), (f), (g) and (l). Reg 11(f) and (g) provide that a certificate about those matters and one of the containers of the blood sample must be delivered to a member of the police force who must, in turn, deliver that copy of certificate and the blood sample container to the Centre. Reg 11(l) provides that the Centre must analyse the blood in the container as soon as is reasonably practicable by or under the supervision of an analyst. Reg 11(m) provides that analyst must complete and sign a certificate setting out various matters, including the result of the analysis and, inter alia, any factors relating to the blood sample or the analysis that might, in the opinion of the analyst, adversely affect the accuracy or validity of the analysis. Reg 11(n) provides that a copy of that certificate must be sent to the person from whom the blood was taken. Reg 11(q) provides that the person from whom the blood was taken may cause the sample of blood in the container provided to him or her to be analysed to determine the blood alcohol level.