This is a case of the changing times leading to miscommunication.
The implied intent of the rule is that READ-ONLY NON-INTERACTIVE Internet use was permitted. To today's students, the Internet is a READ-WRITE INTERACTIVE tool, unless explicitly stated otherwise.
Can you quote the rule because in the article it appears that the intent of the rule was that above all you couldn't interact with other students [on the course] to complete the work but as long as you kept to that rule then general internet resources were fine to use?