Teachers and Leaving Cert candidates cannot have any further discussions about the student's performance in the past two years, nor can they talk about the estimated mark that the teacher will award a pupil under a new calculated grades system.
Updated advice from the Department of Education also confirmed that no additional work could be accepted from students after May 11, the official date for the end of tuition for the Leaving Cert class of 2020.
However, candidates remain students of the school and can continue to access well-being and other supports provided via the Student Support Team until the end of term.
The latest advice comes ahead of detailed guidelines for teachers about how to approach the unprecedented task of providing calculated grades for their pupils, as an alternative to the Leaving Cert exams.
In a new FAQ posting on its website, the department has defended the use of calculated grades as the "fairest way possible" to tackle the effects of lack of schooling and other problems caused by Covid-19.
And it also seeks to calm any student's apprehension about the unprecedented process of awarding end-of-school grades.
"Students have had a very broken schooling experience. Some have had access to schooling through online learning, others haven't," it says in the new FAQ.
It says that teachers will review several pieces of information about students' work over the last two years and will have to keep a record of the evidence that they used to come to the estimated mark as well as the student's overall class ranking.
Once teachers have agreed a percentage mark and class ranking for each student, there will be a further review by the principal, following which the school will send its "results" to the Department of Education, which will conduct a national standardisation process.
That process will take on board two other pieces of data: the pattern of the school's performance in the Leaving Cert over the past three years as well as the Junior Cert results of the current Leaving Cert class.