Nebraska Revised Statute 87-137
Classification of goods and services; rules and regulations.
The secretary shall adopt and promulgate rules and regulations which establish a classification of goods and services for convenience of administration of the Trademark Registration Act, but such rules and regulations shall not 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 may require payment of a fee for each class. To the extent practicable, the classification of goods and services should conform to the classification adopted by the United States Patent and Trademark Office.