Indiana Code Title 27. Insurance § 27-7-10-25

(1) prohibit the establishment of a purchasing group;

(2) make it unlawful for an insurer to provide or offer to provide insurance on a basis providing, to a purchasing group or its members, advantages based on their loss and expense experience not afforded to other persons with respect to rates, policy forms, coverages, or other matters;

(3) prohibit a purchasing group or its members from purchasing insurance on a group basis as described in subdivision (2);

(4) prohibit a purchasing group from obtaining insurance on a group basis because the group has not been in existence for a minimum period of time or because any member has not belonged to the group for a minimum period of time;

(5) require that a purchasing group have a minimum number of members, common ownership or affiliation, or certain legal form;

(6) require that a certain percentage of a purchasing group must obtain insurance on a group basis;  or

(7) otherwise discriminate against a purchasing group or any of its members.