The Public Accounts Committee is to send a final warning to Angela Kerins and Frank Flannery, telling them they have two weeks to agree to attend a public hearing.
TDs decided this evening to seek the powers of compellability to force the former Rehab CEOs to come forward, but have given them two weeks to make their own arrangements before beginning the legal process.
The committee is also to write to other individuals at the HSE and at other related bodies asking them to come forward.
In the meantime it will begin drafting documents to force the two former Rehab CEOs to attend a hearing, and will look for unprecedented legal powers if neither agrees to come forward within the next fortnight.