29 Cancellations are used to invalidate any message which is not self-canceling after a given time period and should include: O Preamble of the original message Names of persons or identification numbers of vehicles involved A brief statement about the reason for cancellation All of the above 30 ) A photograph of a stolen boat can be entered as part of the stolen boat record O True O False 31 ) It is permissible to disseminate INTERPOL data to a private citizen. True False 32 A dental record can be added to an NCIC Missing Person File record. True False