sentences:  Poland had a problem with scientific diving in that for natural sciences it was legally classified as recreational diving, but for archeology it was considered underwater work, until the act of 17 October 2003 classified scientific diving as professional diving, and the Act of 9 May 2014 then exempted scuba diving for research purposes organised by universities and research institutes.In South Africa, scientific diving is considered a form of commercial diving and is within the scope of the Diving Regulations 2009 and the Code of Practice for Scientific Diving published by the Chief Inspector of the Department of Employment and Labour, Under DR 2009 the Codes of Practice are guidance and not compulsory practice.They are provided as recommended good practice, and in theory need not be followed providing an acceptable level of safety is achieved in terms of the Occupational Health and Safety Act No.85 of 1993.