Affiliate Marketing Secrets

I started school in California (United States) during the 1950’s, a time that was defined by the second Red Scare (communism) and the McCarthy Era. Each semester my school district required the students to give a document to their parents or legal guardians to complete and sign. The documents stated in part that the parents or legal guardians of the students are not members of, or affiliated with any organization that sought to overthrow the legal government of the United States. In 1960 my school district discontinued the practice of requiring the students’ parents or legal guardians to sign the document.
What type of documents (if any) did your school district required?