The department may acquire and use identifiable health information collected under AS 18.15.355 — 18.15.395 only if the

1. (1) acquisition and use of the information relates directly to a public health purpose;
2. (2) acquisition and use of the information is reasonably likely to contribute to the achievement of a public health purpose; and
3. (3) public health purpose cannot otherwise be achieved at least as well with nonidentifiable health information.