TV3 faces a possible legal challenge from Irish-language groups less than two months before it is due to go on air.
The co-ordinating body for voluntary Irish-language organisations, Comhdhail Naisiunta na Gaeilge, has written to the IRTC about TV3's decision not to broadcast programmes in Irish and is seeking legal advice on this decision.
A spokesman for comhdhail said they believed TV3's present policy did not meet broadcasting obligations under the current Radio and Television Act 1988.
The Act states that it is incumbent on broadcasters to "have special regard to the elements which distinguish that culture (of the whole island of Ireland) and, in particular for the Irish language".
The spokesman said they would "reluctantly" taken legal action against TV3 if necessary.
An IRTC spokesman said there were "ongoing discussions" and a "few matters still in negotiation" with TV3. The status of Irish was one of these.
A spokeswoman for TV3 said there was no Irish-language requirement in its licence. The Irish language would be reflected in the "broader context of Irish culture".
She added that Irish-language advertisers would receive concessionary rates.
Ironically, TV3 has no lack of Irish speakers, having recently recruited reporters, presenters and technicians from TnaG. The station now has three high-profile women from TnaG's newsroom, Gillian Ni Cheallaigh, Grainne Seoighe and Maire Dirrane.