This chapter shall not be construed to prohibit the display of public
service messages designed to communicate the hazards of cigarettes, tobacco
products or smokeless tobacco or to encourage minors to refrain from consuming
or purchasing tobacco products. However, this section shall not be construed
to permit such a message when it is made in conjunction with the positive
display of a recognized image, artwork, photograph, logo or graphic used for
marketing or promotion of cigarettes, tobacco products or smokeless tobacco.
The effective date of this chapter shall be on the date of its enactment
provided the provisions of this chapter shall not, except with respect to
renewals of any contract occurring after the effective date, be interpreted
or applied in a manner which will impair or affect any right or obligations
under any contract in existence as of the effective date of this chapter.