8. Where immediately before [F1 1st October, 1973] a hospital order or a guardianship order made under Part III of the Mental Health Act is in force by virtue of which a person is committed to the care of the Northern Ireland Hospitals Authority or the guardianship of a management committee the order shall have effect on and after [F1 1st October, 1973] as if it committed him to the care of the Ministry or, as the case may be, the guardianship of a Health and Social Services Board.N.I.