Well put in a different way, you have the right to see a search warrant when you have asked to do so.  All of this comes under the Fourth Amendment rights guaranteed us.  They are known as "search and seizure" rights.  If you do not give consent and the police do not have a valid search warrant then you can not generally be searched.  And what is also important to know is that the police can not go beyond the scope and limits of the search warrant.  They need to comply with what it says.  Speak with an attorney in your area if you think that your rights may have been violated.