The General Assembly finds that the manufacture, distribution, sale, possession, or use of marijuana, controlled substances, or dangerous drugs in an unlawful manner is a serious threat to the public health, safety, and welfare and to the academic achievement of students enrolled in the public and nonpublic colleges, universities, and postsecondary technical institutes of this state. It is declared to be a primary purpose and goal of this state, of all of its agencies and instrumentalities, and of all of its public officials and employees to take all reasonable steps possible to eradicate the unlawful manufacture, distribution, sale, possession, and use of marijuana, controlled substances, and dangerous drugs. With this purpose in mind, the General Assembly declares that the public and nonpublic colleges, universities, and postsecondary technical institutes in this state must be absolutely free of any person who would knowingly manufacture, distribute, sell, possess, or use marijuana, a controlled substance, or a dangerous drug in an unlawful manner. For this reason, the General Assembly enacts this article.