Sources for content rating systems

    Source: http://en.wikipedia.org/wiki/Television_content_rating_systems
    Sources:
    ACB: http://www.classification.gov.au/Industry/Journey/Pages/TV/Step1.aspx
    ABC classification: Appendix 4 of http://www.abc.net.au/mediawatch/transcripts/0935_industry.pdf
    SBS classification: http://www.sbs.com.au/aboutus/faqs/index/id/115/h/Classification
    Pay TV: http://www.astra.org.au/advocacy/classification
    Free TV Code of Practice: Appendix 1 of Part B in http://www.freetv.com.au/media/Code_of_Practice/
    Commercial_Television_Industry_Code_of_Practice_2015_-_New_Code_and_Explanatory_Materials.pdf
    Source: http://www.justica.gov.br/seus-direitos/classificacao/guia-pratico/practical-guide.pdf/view
    Source: http://www.cbsc.ca/english/agvot/englishsystem.php
    Source: http://www.cbsc.ca/english/agvot/frenchsystem.php
    Source: Table 81 of DVB SI (EN 300 468 V1.14.1) in https://www.dvb.org/standards
    Source: STD-B10 in http://www.dibeg.org/techp/aribstd/aribstd.html
    Source: http://www.law.go.kr/admRulLsInfoP.do?admRulSeq=2000000118507
    Source: http://www.mda.gov.sg/RegulationsAndLicensing/ContentStandardsAndClassification/FilmsAndVideos/
    Pages/default.aspx
    Source: http://www.tvguidelines.org/ratings.htm
    Source: http://www.mpaa.org/film-ratings/