Students will be able to register their preferred option for this year's Leaving Cert today.
The self-service portal opens at midday, with students able to indicate whether they wish to sit the exam, take calculated grades, or both.
Registration closes next Tuesday, but will open again around the end of April, where they will be asked to confirm their choices.
Meanwhile students could face having exam results withheld if there's evidence of interference in the calculated grades process. as part of new legislation being considered by the government.
"More serious consequences" are also being considered, with details to be published shortly.
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