4.—(1) An HSS trust shall submit to a Health and Social Services Board a scheme for the exercise by the trust on behalf of the Board of relevant functions which are, or are proposed to become, so exercisable by the trust by virtue of an authorisation.
(2) A Health and Social Services Board may approve a scheme submitted to it by an HSS trust under paragraph (1), either without modifications or with such modifications as may be agreed with the trust.
(3) A Health and Social Services Board shall submit a scheme approved by it under paragraph (2) to the Department.
(4) The Department may approve a scheme submitted to it under paragraph (3), either without modifications or with such modifications as may be agreed with the Health and Social Services Board and the HSS trust concerned.
(5) An HSS trust shall give effect to any scheme approved by the Department under paragraph (4).
(6) An HSS trust may at any time, and shall if so requested by a Health and Social Services Board on whose behalf any relevant functions are exercisable by the trust by virtue of an authorisation, submit a new scheme under this Article to the Board and paragraphs (2) to (5) shall apply to any such new scheme as they apply to a scheme submitted under paragraph (1).