(1) A buyer takes free of a lien in crops if he purchases and pays for a crop before a notice of claim of lien is filed with the secretary of state.
(2)  A buyer who has registered for, and has received, the list of liens described in section 45-312, Idaho Code, takes free of a lien in crops if:
(a)  When he purchases and pays for a crop, there is no notice of claim of lien in that crop on the current list of liens published under section 45-312, Idaho Code; and
(b)  He has no actual notice of the existence of the lien.
As against buyers, a list is current until the third day after publication of the next list, or if mail is not delivered on that day, on the next day thereafter on which mail is delivered.