http://www.legislation.gov.uk/anaw/2018/2/section/40/notesExplanatory Notes to Additional Learning Needs and Education Tribunal (Wales) Act 2018Education and Public Services Group of the Welsh GovernmentenKing's Printer of Acts of Parliament2018-01-29 2 24 January 2018 Chapter 2 – Individual Development Plans 106 The purpose of section 40 is to ensure that where it is brought to the attention of, or otherwise appears to, a home authority in Wales that a detained person may have ALN and an IDP is not being kept for them under section 42 the home authority must decide whether the child or young person has ALN. If the home authority decides that the person does have ALN, it must decide in accordance with regulations under section 45 whether it will be necessary to maintain an IDP for that child or young person once they have been released from detention in order to meet their reasonable needs for education or training. 107 In order to make this decision, there is a duty placed on the home authority to invite the person in charge of the relevant youth accommodation to participate in the decision-making process, and if necessary in the preparation of an IDP. A copy of the IDP must be given to the detained child and their parent, or the detained young person, and the person in charge of the relevant youth accommodation. 108 The home authority must notify the detained child and their parent, or the detained young person, and the person in charge of the relevant youth accommodation, if it decides that the child or young person does not have ALN or that maintaining an IDP would not be necessary when he or she is released. The home authority must provide an explanation of the reasons for their decision. See sections 84 and 85 in respect of the requirements to notify, or give copies of a plan to, a child.