At hynny, cyflwynwyd codau newydd ar gyfer cofnodi absenoldebau ym Medi 2010. Bellach gall penaethiaid gofnodi 'dim rhaid bod yn bresennol' yn erbyn enwau disgyblion mewn nifer fach o sefyllfaoedd penodol gan gynnwys tywydd garw yn y gaeaf. Felly, os bydd yn rhaid i ysgol gau hanner ffordd drwy’r dydd, ni fydd hynny’n effeithio ar ei hystadegau presenoldeb. Mae’n bosibl bod penaethiaid yn y gorffennol wedi teimlo rheidrwydd i gau eu hysgolion cyn dechrau’r diwrnod ysgol, am fod absenoldebau o’r fath ar y pryd yn cael eu cofnodi fel rhai 'awdurdodedig' ac yn effeithio ar eu hystadegau presenoldeb.
In addition to this, new absence recording codes were introduced in September 2010. Head teachers are now able to record pupils as 'not required to attend' in a small number of specific situations including severe winter weather. This means that should a school be forced to close half way through the day their attendance statistics would no longer be affected. Previously, head teachers may have felt compelled to pre-emptively shut their schools as such absences were recorded as 'authorised' and affected their attendance statistics.