48In paragraph 3 of Schedule 1 to the National Service Act 1948 (which includes among the categories of persons not liable for service certain persons suffering from mental disabilities), for the words "Regional Hospital Board" there shall be substituted the words " Regional Health Authority or of an Area Health Authority of which the area is in Wales " and for the words from " local health authority ", where they first occur, onwards there shall be substituted the words " council which is a local authority for the purposes of the Local Authority Social Services Act 1970 and so provided in pursuance of section 12 of the Health Services and Public Health Act 1968 or is otherwise receiving care from such a council in pursuance of that section ".