General Section 18: "Harbour" and "harbour authority"
Section 18 provides definitions of "harbour" and "harbour authority", which align with the definitions in the Harbours Act 1964 for England, Wales and Scotland, and the Harbours Act (Northern Ireland) 1970 for Northern Ireland.
	References in the Act to harbours of a harbour authority are to harbours in respect of which it is the harbour authority. In circumstances where there is more than one harbour authority in respect of a particular harbour, subsection (3) provides a power for regulations to specify which harbour authority is the responsible authority for that harbour, and therefore subject to the powers and duties in the Act.