follow this link and watch the video this will explain things a lil more clearly but unless you have broken a law you can refuse to give them consent to search and if you do this and they find anything your attorney can file a motion to supress which means any evidence obtained in said search is inaddmisable http://stopthedrugwar.org/videos/busted you can also find out more about penaltys for possesion at norml,s web page they have a listing for each state