Section 105 of SOPA, entitledImmunity for Taking Voluntary Action Against Sites that Endanger Public Health, provisions that service providers, network providers, advertising services, search engines, domain name registry services, and other parties that handle internet content will be immune from prosecution should they decide to arbitrarily pull sites that "endanger the public health."
What is considered an endangerment of public health in SOPA? Websites that offer, sell, dispense, or distribute prescription medications without valid prescriptions, or sites that do the same with prescription medications that have been "adulterated or misbranded," according to the section. The definitions of "misbranded," "prescription medication," "drug," and "valid prescription," are also notated with references in the Federal Food, Drug, and Cosmetic Act, and the Controlled Substances Act.