It shall be unlawful for any person, firm or corporation to engage in the business of buying, selling, trading or exchanging new, used or second-hand motor vehicles or offering to buy, sell, trade or exchange, or participate in the negotiation thereof, or attempt to buy, sell, trade or exchange any motor vehicle or interest therein, or of any written instrument pertaining thereto, on the first day of the week, commonly called Sunday.

     That it shall be unlawful for any person, firm or corporation to keep open their establishment or place of business on the first day of the week, commonly called Sunday, for any of the purposes mentioned in section 1 of this act: Provided, however, That nothing in this act shall apply to any person who conscientiously believes that the seventh day of the week, from sunset Friday to sunset Saturday, should be observed as the Sabbath and who actually refrains from conducting or engaging in the business of buying, selling or offering for sale motor vehicles, or performing other secular business on that date.

     Any person, firm or corporation who violates or offends against the provisions of this act shall be guilty of a misdemeanor, and upon conviction thereof shall be punished by the laws of this state, or by the court, in its discretion, suspending or revoking the dealer's license to do business within the state, or by fine and imprisonment and suspension and/or revocation, in the discretion of the court.

     This act shall not apply to counties having a population under 130,000 inhabitants according to the latest or each succeeding federal decennial census.