Any person who operates a motor vehicle upon the public highways of the city shall be deemed to have given consent, subject to the provisions of SMC 10.56.040 through 10.56.090, to a chemical test or tests of his breath or blood for the purpose of determining the alcoholic content of his blood if arrested for any offense where, at the time of the arrest, the arresting officer has reasonable grounds to believe the person had been driving or was in actual physical control of a motor vehicle while under the influence of intoxicating liquor. The test or tests shall be administered at the direction of a law enforcement officer having reasonable grounds to believe the person to have been driving or in actual physical control of a motor vehicle upon the public highways of this city while under the influence of intoxicating liquor. Such officer shall inform the person of his right to refuse the test, and of his right to have additional tests administered by any qualified person of his choosing as provided in SMC 10.56.040 through 10.56.090. The officer shall warn the driver that his privilege to drive will be revoked or denied if he refuses to submit to the test. Unless the person to be tested is unconscious, the chemical test administered shall be of his breath only. (Ord. 299 § 1(a), 1969).