Students who try to influence their calculated grade for the Leaving Cert will be reported to the Department of Education.
New guidance issued to teachers says any sort of pressure or inducement - like gifts - could undermine the new system.
Cabinet has also decided to indemnify teachers and school leaders against any legal action relating to the marks they give.
Education Minister Joe McHugh says no student or parent should try to influence the calculated grades they get:
"The guidance is very clear and strict on the issue of canvassing of teachers and principals. Canvassing would be unfair to students and to staff in a school, and it will not be tolerated in any circumstances."
Students can expect to receive their results as close as possible to the usual results system in August.
*Reporting by Stephen Murphy