Amendments Nos. 15 and 17 deal with the issue of confidentiality of sources and information supplied in confidence. The new requirement on a data controller to disclose whatever information is available about the sources of data could have unintended and serious consequences, one of which might be a reluctance on the part of people to volunteer information in a variety of situations where the availability of that information could have beneficial consequences. The possibility that sources might be disclosed could deter the giving of such information which would not be in the public interest.