(1)The Secretary of State may by regulations made by statutory instrument provide for any provision of sections 159 and 160 to come into force for a period of time to be specified in or under the regulations for the purpose of assessing the effectiveness of the provision.
(2)Regulations under subsection (1) may make different provision for different purposes or different areas.
(3)More than one set of regulations may be made under subsection (1).
(4)Provision included in regulations under subsection (1) does not affect the provision that may be included in relation to sections 159 and 160 in regulations under section 183 (commencement).