Safety and occupational health surveys can be conducted by designated officials; employers must facilitate and workers may be examined. Section 20 authorises named safety officials to conduct on site safety and occupational health surveys after written notice; employers must provide facilities for examination, testing, sample collection and data. The provision requires workers to submit to medical examination and furnish relevant information when asked, and treats time spent in such examinations or information giving as working hours for wage and overtime calculations. Survey reports submitted to the appropriate Government are deemed reports of an Inspector cum Facilitator.