Section 360-I. Classification

The secretary shall by regulation establish a
  classification  of  goods and services for convenience of administration
  of this  article,  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  may  require
  payment  of  a  fee  for  each  class.  To  the  extent  practical,  the
  classification  of  goods   and   services   should   conform   to   the
  classification adopted by the United States Patent and Trademark Office.