Already by 1925 there was a split, with the Northern Ireland Amateur Athletic, Cycling and Cross Country Association (NIAAA) formed over a dispute concerning an Easter Monday sports meeting in Belfast, which as well as athletics featured
greyhound racing and associated betting, which had been allowed by the IAAA but not by NACA. Since the meeting was to raise funds for
Belfast Celtic F.C., with an
Irish nationalist fanbase, the NACA alienated nationalists as well as unionists in Belfast. In 1931,
Eoin O'Duffy was president of the NACA, and raised at the IAAF the dispute with the British AAA over jurisdiction over Northern Ireland. The IAAF deferred a decision till its conference at the
1932 Olympics. However, the proposal foundered when an NACA general meeting insisted that the flag used at international events be the
Irish tricolour rather than the IAAU flag. The IAAF decided in 1932 not to intervene in the Northern jurisdiction dispute. Most Irish athletics clubs remained in NACA, and it was NACA that was affiliated to the
Irish Olympic Council, though it was AAUE athletes who competed at the Olympics.
Ronnie Delany's gold medal in the
1956 1500 m was not mentioned at the next NACA executive meeting. In 1959, Tom O'Riordan's scholarship with the
Idaho State Bengals was jeopardised when he ran for his local NACA club while visiting home in
Tralee. The AAUE, whose Secretary Louis Vandendries was on holiday, reported him to the IAAF, which suspended him; upon Vandendries' return he defused the controversy by informing the IAAF that O'Riordan was now in good standing with the AAUE. The UCI emulated the IAAF in 1947 by requiring the NCA to disclaim Northern Ireland, expelling it when it refused. In 1949, several clubs broke away from the NCA to form (CRE), which would restrict its area of jurisdiction to the
Republic of Ireland. The CRE was recognised by the UCI, as was the Northern Ireland Cycling Federation (NICF), formed the same year and linked to the
British Cycling Federation. The NACA retained some international links, through the
International Labour Sports Federation (CSIT).
Joe Christle, NCA official and organiser of the Rás Tailteann, was both a socialist and
physical force republican. ==Dissolution==