Georgia Code Title 40. Motor Vehicles and Traffic § 40-5-153

(a) Any person who drives a commercial motor vehicle anywhere in the state shall be deemed to have given consent, subject to the provisions of Code Sections 40-5-55 and 40-6-392, to a test or tests of that person's blood, breath, or urine for the purpose of determining that person's alcohol concentration or the presence of other drugs.

(b) A test or tests may be administered at the direction of a law enforcement officer who, after stopping or detaining the commercial motor vehicle driver, has probable cause to believe that driver was driving a commercial motor vehicle while having any measurable alcohol in his or her system.

(c) A person requested to submit to a test as provided in subsection (a) of this Code section must be warned by the law enforcement officer requesting the test that a refusal to submit to the test will result in that person's being disqualified from operating a commercial motor vehicle for one year under Code Section 40-5-151 and from operating a private motor vehicle as provided in Code Section 40-5-67.1.

(d) If the person refuses testing, the law enforcement officer must submit an affidavit to the department within ten days of such refusal certifying that the test was requested pursuant to subsection (a) of this Code section and that the person refused to submit to testing.

(e) Upon receipt of the affidavit submitted by a law enforcement officer under subsection (d) of this Code section, the department must disqualify the driver from driving a commercial motor vehicle for a period of one year as provided under Code Section 40-5-151 and, if the driver refused testing, from operating a private motor vehicle as provided under Code Section 40-5-67.1. If the driver is in possession of a driver's license, the officer shall take possession of the license and attach it to the affidavit.