Probation period

1. A person whose driver’s license or operating privileges have been suspended, revoked, or barred under this chapter for a conviction of a moving traffic violation, or suspended, revoked, or barred under section 321.205 or section 321.210, subsection 1, paragraph “a”, subparagraph (5), must satisfactorily complete a twelve-month probation period beginning immediately after the end of the period of suspension, revocation, or bar. Upon a second conviction of a moving traffic violation which occurred during the probation period, the department may suspend the driver’s license or operating privileges for an additional period equal in duration to the original period of suspension, revocation, or bar, or for one year, whichever is the shorter period. 2. A person whose driver’s license or operating privileges have been revoked under chapter 321J, must satisfactorily complete a twelve-month probation period beginning immediately after the end of the period of revocation. Upon conviction of a moving traffic violation which occurs during the probation period, the department may revoke the driver’s license or operating privileges for an additional period equal in duration to the original period of revocation, or for one year, whichever is the shorter period. 3. For purposes of determining a conviction under this section, the department shall not consider the first two speeding violations within the probation period that are ten miles per hour or less over the legal speed limit in speed zones having a legal speed limit between thirty-four miles per hour and fifty-six miles per hour.