Complex sentence: The margin of appreciation doctrine was introduced to Convention jurisprudence in 1956, through a decision of the European Commission of Human Rights to permit the United Kingdom-under Article 15-to derogate from its Convention obligations in a time of public emergency.
Split into simpler sentences: The margin of appreciation doctrine was introduced to Convention jurisprudence in 1956. This occurred through a decision of the European Commission of Human Rights to permit the United Kingdom, under Article 15, to derogate from its obligations in a time of public emergency.