(a) A person who has signed a general consent form for the performance of medical tests or procedures is not required to also sign or be presented with a specific consent form relating to medical tests or procedures to determine HIV infection, antibodies to HIV, or infection with any other probable causative agent of AIDS that will be performed on the person during the time in which the general consent form is in effect.
(b) Except as otherwise provided by this chapter, the result of a test or procedure to determine HIV infection, antibodies to HIV, or infection with any probable causative agent of AIDS performed under the authorization of a general consent form in accordance with this section may be used only for diagnostic or other purposes directly related to medical treatment.