Which requirement is necessary for an individual to issue a certificate for testing instruments under O.C.G.A. 40-6-392?

To issue a certificate for testing instruments under O.C.G.A. 40-6-392, the individual must hold a valid permit. This requirement ensures that the person authorized to conduct tests and issue certificates has met the necessary qualifications set by the state to ensure accuracy and reliability in determining blood alcohol content. Holding a valid permit indicates that the individual has undergone proper training and validation within established guidelines, ensuring compliance with legal and technical standards. This distinction is crucial in maintaining the integrity of the testing process and upholding public safety regulations regarding alcohol consumption. The necessity of a valid permit helps to prevent unqualified individuals from performing tests that could lead to legal implications for individuals charged with DUI or other related offenses.