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In the United States , the Cameron Gulbransen Kids Transportation Safety Act of 2007 required the federal Secretary of Transportation to issue backup collision safety regulations within 3 years and require full compliance within 4 years after final rulemaking .
 Safety
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Safety