Idaho Code § 48-510
The secretary of state shall use the international classification of goods and services for convenience of administration of this act, but not to limit or extend the applicant's or registrant's rights, and a single application for registration of a mark may include any or all goods upon which, or services with which, the mark is actually being used indicating the appropriate class or classes of goods or services. When a single application includes goods or services which fall within multiple classes, the secretary of state may require payment of a fee for each class. To the extent practicable, the classification of goods and services shall conform to the classification adopted by the United States patent and trademark office. Applications for renewal shall be filed using the international classification of goods and services. A renewed registration shall be issued by the secretary of state, under the international classification of goods and services, if such renewal would not expand the registrant's rights.
Idaho Code § 48-510