The Eastern European Supreme Court was established by the West Indies Associated States in 1967 under the Supreme Court Order no. 223. The main composition of the West Indies Associated States is the islands that changed their statues from being a British colony to states in free association with the United Kingdom.
These islands also form part of the Organization of Eastern Caribbean States. From the West Indies Act of 1967, Her Majesty by Order in Council established common courts for the associates states of Antigua, Anguilla, Dominica, Grenada, Saint Vincent, Saint Kitts & Nevis, and Saint Lucia with such jurisdiction and powers as may be so specified or determined. There are also provisions made on the establishment of a commission to appoint judges and officers of the Court, remuneration, allowances and pension rights of the commission. This also included judges and officers of the court and also for defraying the expenses of the commission and the courts.
With relation to Grenada, the ECSC is styled as the Supreme Court of Grenada and the West Indies Associated States as seen in the Grenada Constitutions section 105. A change was initiated by the Supreme Court Order and this was mainly the fusion of the High Court and Court of Appeal. It also confined all appeals to the Court of Appeals. This then facilitated a greater supervisory jurisdiction over the legal system of the individual states by the Supreme Court. The constitution of the individual states and the local legislatures enacted statutory provision to give life to the Supreme Court Order of 1967.