19.__Certain incorporated nonprofit educational organizations.__ Sales to incorporated nonprofit educational organizations that are receiving, or have received, funding from the Department of Education and that provide educational programs specifically designed for teaching young people how to make decisions about drugs, alcohol and interpersonal relationships at a residential camp setting;

20.__Charitable suppliers of medical equipment.__Sales to local branches of incorporated international nonprofit charitable organizations that provide, on a loan basis and free of charge, medical supplies and equipment to persons;

21.__Organizations fulfilling wishes of children with life- threatening diseases.__Sales to incorporated nonprofit organizations whose sole purpose is to fulfill the wishes of children with life-threatening diseases when their families or guardians are unable otherwise to financially fulfill those wishes;

22.__Incorporated nonprofit providers of certain support systems for single-parent families.__Sales to incorporated nonprofit organizations engaged primarily in providing support systems for single-parent families for the development of psychological and economic self-sufficiency;

23.__Nonprofit home construction organizations.__Sales to local branches of incorporated nonprofit organizations whose purpose is to construct low-cost housing for low-income people;

24. Vietnam veteran registries.__Sales to incorporated, nonprofit organizations whose sole purpose is to create, maintain and update a registry of Vietnam veterans;

25.__Organizations providing certain services for hearing- impaired persons.__Sales to incorporated nonprofit organizations whose primary purposes are to promote public understanding of hearing impairment and to assist hearing-impaired persons through the dissemination of information about hearing impairment to the general public and referral to and coordination of community resources available to hearing-impaired persons;

26.__State-chartered credit unions.__Sales to credit unions that are organized under the laws of this State.__This subsection remains in effect only for the time that federally chartered