s 93B Preliminary breath test
(1) In a situation described in section 93A(1) or (3), a preliminary breath test is a procedure administered by a service policeman under which— (a) the affected person provides a specimen of breath; and (b) the specimen is used for the purpose of obtaining, by means of an approved device, an indication whether the proportion of alcohol in the person's breath or blood is likely to be such as is necessary for the commission of the suspected offence. (1A) In a situation described in section 93A(3A), (3B) or (3C), a preliminary breath test is a procedure administered by a service policeman under which— (a) the affected person provides a specimen of breath; and (b) the specimen is used for the purpose of obtaining, by means of an approved device, an indication of the proportion of alcohol in the person's breath or blood. (2) A preliminary breath test may be administered only— (a) at or near the place where the requirement to co-operate with the test is imposed; (b) at a service police establishment determined by the service policeman; or (c) at a medical establishment. (3) In this section “ the suspected offence ” means an offence mentioned in section 93A(1)(a) or (3)(a) which the commanding officer has reasonable cause to believe has been committed.