The new regime will come into place from midnight tomorrow.
It means close contacts who have been boosted and don't have symptoms won't have to restrict their movements.
Under 40s won't be sent for a PCR test if they have a positive antigen.
Anyone with a positive test will have to isolate for seven days.
The European Centre for Disease Prevention and Control has said the approach is non-evidence based, but Micheál Martin believes it's the right balance:
"I do take that point but as I said earlier, it's about balance between the pressures as EDC did identify on supply chains, on healthcare systems, on education systems and so forth.
That balance needs to be required but you also have to factor in Ireland's high level of vaccination compared to other countries."