Last year, Congress adopted legislation limiting the content of the contacts.
The Guinness UDV division of Diageo, the giant British spirits producer, became the first distiller to advertise under the guidelines, which also limited the content of liquor spots and required that they appear only at night.
One reason the Philip Morris brand is no longer sold in this country was that regulations restricting cigarette advertising would have limited the content and placement of the corporate ads if a product was being sold under that same name.
Strict guidelines limiting the content allowed on Apple's App Store are a primary reason why Instagram censors pictures of female nipples, the company's chief executive Kevin Systrom has admitted.
"While it is accepted practice for the International Olympic Committee to restrict placement of advertising around Olympic venues," the letter said, "it is not acceptable for the city to limit the content or access of free speech for any reason or under any condition".
Executives involved in the petitions claimed that the "political climate" was responsible for what they labeled a broad and hopelessly vague standard for decency in programming, which has driven broadcasters to take drastic steps to limit the content of programs they broadcast.
In fact, the report notes that 225 million people live in countries where the ability to pay may limit the content and services they can access.
The authors acknowledge that teaching STEM from the proposed approach is not possible in all circumstances and could limit the content taught from this approach.
Some publishers have cultivated a tight following on Digg by digging and commenting on content other than their own, adding Digg buttons prominently to articles on their site and limiting the content they submit to just their best content.
This methodology was based on utilisation of specially designed extraction methods with subcritical water, supercritical carbon dioxide and their combination to limit the content of organics and also to establish the particles' enhanced photoactivity without recourse to high temperatures.
