Where it is decided that the child or young person has ALN, the school, FEI or LA will then usually be required to prepare and maintain an Individual Development Plan (IDP) for the child.
Os penderfynir bod gan y plentyn ADY, fel rheol bydd gofyn i'r ysgol, y sefydliad addysg bellach neu'r awdurdod lleol baratoi a chynnal Cynllun Datblygu Unigol (CDU) ar gyfer y plentyn.