(a) Upon receipt of a request for a criminal history and involuntary hospitalization records check, the bureau shall immediately, during the licensee's call or by return call:

(1) Review all criminal history and involuntary hospitalization records electronically available to the bureau to determine if the potential buyer or transferee is prohibited from receipt or possession of a handgun pursuant to state or federal law; and

(2) Inform the licensee making the inquiry that its records demonstrate that the potential buyer or transferee is so prohibited or provide the licensee with a unique transaction number.

(b) In the event that the electronic check of records available to the bureau as provided in subsection (a) of this Code section reveals the existence of a criminal history record not immediately available to the bureau so as to determine the eligibility of the potential buyer to purchase a handgun, the bureau shall in the same call or return call advise the licensee of such existing, but not immediately available, record. In that event, the licensee shall not complete the sale of the handgun until the bureau advises the licensee that information subsequently received as a result of that request shows that the potential buyer is not prohibited from receiving or possessing a handgun under state or federal law.