[58A. Nature and scope of rights under section 55---(1) The right to
 use a patented invention under section 55 of this Act---
   (a) Is not exclusive:
   (b) Must not be assigned otherwise than in connection with the
         goodwill of the business in which the patented invention is
         used:
   (c) Is, notwithstanding subsection (2) (a) of that section, limited to
         the supply of the patented invention predominantly in New
         Zealand by a Government Department or a person authorised by a
         Government Department under that section.

   (2) The right to use a patented invention under section 55 of this Act
 may, on the application of any interested party, be terminated by the
 Court, where the Court is satisfied that the circumstances that gave
 rise to the right to use the patented invention have ceased to exist and
 are unlikely to recur.

   (3) Except in a case to which section 58 of this Act applies, the
 right to use a patented invention under section 55 of this Act is
 subject to the Government Department or person authorised by a
 Government Department under section 55 of this Act having first taken
 all reasonable steps to obtain the consent of the patentee to the use of
 the patented invention on reasonable terms and conditions, and having
 failed to obtain such consent within a reasonable period of time.