The main issues omitted by Sunningdale and addressed by the Belfast Agreement are the principle of self-determination , the recognition of both national identities, British-Irish intergovernmental cooperation and the legal procedures to make power-sharing mandatory, such as the cross-community vote and the d'Hondt system to appoint ministers to the executive.   Former IRA member and journalist Tommy McKearney says that the main difference is the intention of the British government to broker a comprehensive deal by including the IRA and the most uncompromising unionists.  Regarding the right to self-determination, two qualifications are noted by the legal writer Austen Morgan. Firstly, the cession of territory from one state to another state has to be by international agreement between the UK and Irish governments. Secondly, the people of Northern Ireland can no longer bring about a united Ireland on their own; they need not only the Irish government but the people of their neighbouring state, Ireland, to also endorse unity. Morgan also point out that, unlike the Ireland Act 1949 and the Northern Ireland Constitution Act 1973 , devised under Sunningdale, the 1998 agreement and the consequent British legislation did expressely foresee the possibility of a united Ireland.