Nothing in the Act approved June 19, 1936, known as the Robinson-Patman Antidiscrimination Act, shall apply to purchases of their supplies for their own use by schools, colleges, universities, public libraries, churches, hospitals, and charitable institutions not operated for profit.
15 U.S. Code § 13c - Exemption of non-profit institutions from price discrimination provisions
The Act approved June 19, 1936, known as the Robinson-Patman Antidiscrimination Act, referred to in text, is act June 19, 1936, ch. 592, 49 Stat. 1526, also known as the Robinson-Patman Price Discrimination Act, which enacted sections 13a, 13b, and 21a of this title and amended section 13 of this title. For complete classification of this Act to the Code, see Short Title note set out under section 13 of this title and Tables.