G. In a trial, action or proceeding for a violation of this section or section 28-1383 other than a trial, action or proceeding involving driving or being in actual physical control of a commercial vehicle, the defendant's alcohol concentration within two hours of the time of driving or being in actual physical control as shown by analysis of the defendant's blood, breath or other bodily substance gives rise to the following presumptions:

1. If there was at that time 0.05 or less alcohol concentration in the defendant's blood, breath or other bodily substance, it may be presumed that the defendant was not under the influence of intoxicating liquor.

2. If there was at that time in excess of 0.05 but less than 0.08 alcohol concentration in the defendant's blood, breath or other bodily substance, that fact shall not give rise to a presumption that the defendant was or was not under the influence of intoxicating liquor, but that fact may be considered with other competent evidence in determining the guilt or innocence of the defendant.

3. If there was at that time 0.08 or more alcohol concentration in the defendant's blood, breath or other bodily substance, it may be presumed that the defendant was under the influence of intoxicating liquor.

H. Subsection G of this section does not limit the introduction of any other competent evidence bearing on the question of whether or not the defendant was under the influence of intoxicating liquor.