Anglican churches are governed under episcopal polity — overseen by bishops, organised into dioceses, grouped into self-governing provinces. Decisions within a province are usually made through a synod, a governing body that typically includes bishops, clergy, and laity together, rather than by bishops alone.
There is no single global authority over the whole Anglican Communion. Instead, the Communion is held together informally by four Instruments of Communion: the Archbishop of Canterbury (a focus of unity), the Lambeth Conference of bishops (meeting roughly every ten years), the Primates' Meeting, and the Anglican Consultative Council. None of these bodies has binding legal authority over an individual province — each remains free to govern its own affairs.