Any person found guilty of a violation of this
chapter shall be punishable as follows: for a first conviction by
a fine of not more than $100 or imprisonment for not more than 15
days, or both; for a conviction of a second violation, both of which
were committed within a period of 18 months, by a fine of not more
than $200 or imprisonment for not more than 45 days, or both; and
upon a conviction of a third or subsequent violation, all of which
were committed within a period of 18 months, by a fine of not more
than $300 or imprisonment for not more than 90 days, or both.