Idaho Code § 34-1811
The manner of voting upon measures submitted to the people shall be the same as is now or may be required and provided by law; no measure shall be adopted unless it shall receive an affirmative majority of the aggregate number of votes cast on such measure. If two (2) or more conflicting laws shall be approved by the people at the same election, the law receiving the greatest number of affirmative votes shall be paramount in all particulars as to which there is a conflict, even though such law may not have received the greatest majority of affirmative votes. If two (2) or more conflicting amendments to the constitution shall be approved by the people at the same election, the amendment which receives the greatest number of affirmative votes shall be paramount in all particulars as to which there is a conflict, even though such amendment may not have received the greatest majority of affirmative votes.
Idaho Code § 34-1811