Kerala is an Indian state, where federal legislative power is vested in the unicameral Kerala Legislative Assembly. The multilateral system has, since 1956, been dominated by the several pre-poll and post-poll alliances. The judiciary of Kerala is independent of the executive and the legislature, while it is common for leading members of the executive (Kerala Council of Ministers) to be members of the legislature as well. The political system is laid out in the Constitution of India (1950).