3.__Results of test.__Upon the request of the person who submits to a chemical test or tests at the request of a law enforcement officer, full information concerning the test or tests must be made available to that person or that person's attorney by the law enforcement officer.

4.__Blood-alcohol level.__The following percentages by weight of alcohol in the defendant's blood have the following evidentiary effect.

A.__If there was, at the time alleged, 0.05% or less by weight of alcohol in the blood of a defendant who was 21 years of age or older at the time of arrest, it is prima facie evidence that the defendant was not under the influence of intoxicating liquor.

B.__If there was, at the time alleged, in excess of 0.05% but less than 0.08% by weight of alcohol in the blood of a defendant who was 21 years of age or older at the time of the arrest, it is relevant evidence, but it is not to be given prima facie effect in indicating whether or not the defendant was under the influence of intoxicating liquor within the meaning of this section, but that fact may be considered with other competent evidence in determining whether or not the defendant was under the influence of intoxicating liquor.

C.__For purposes of evidence in proceedings other than those arising under section 10701, subsection 1, it is presumed that a person was under the influence of intoxicating liquor when that person has:

(1) For a person 21 years of age or older, a blood- alcohol level of 0.08% or more by weight; and

(2) For a person less than 21 years of age, any amount of alcohol in the blood.

D.__Percent by weight of alcohol in the blood is based upon grams of alcohol per 100 milliliters of blood.