In section 25(2) of that Act (which provides that no payment shall be made under subsection (1) of that section to a medical practitioner in respect of an examination carried out as part of his duty to provide general medical services for the person examined or as part of his duty as an officer of a Regional Hospital Board or a Board of Governors), for the words " Regional Hospital Board or a Board of Governors of a teaching hospital" there shall be substituted the words " Regional Health Authority, an Area Health Authority or a special health authority ".