What it does
The Marine and Harbours Act 1981 establishes a statutory framework for the administration, development, and regulation of marine and harbour infrastructure in Western Australia, excluding the major commercial ports now overseen by independent Port Authorities under the Port Authorities Act 1999. At its core, the Act vests responsibility in the Minister for Transport (who is constituted as a body corporate under s. 8) and the Department principally assisting the Minister (defined in s. 3 as the relevant Public Service department).
Section 5(1) enumerates the Department's functions in exhaustive detail. These include controlling marine and port affairs and navigation (s. 5(1)(a)), providing pilotage services outside Port Authority ports (s. 5(1)(b)), advising the Minister (s. 5(1)(c)), assisting Port Authorities on development and capital expenditure when requested (s. 5(1)(d)), regulating safety of life connected with shipping and boating and constructing necessary facilities (s. 5(1)(e)), constructing, managing, and commercially promoting smaller ports (s. 5(1)(f)–(g)), doing the same for harbours including boat harbours declared under the Shipping and Pilotage Act 1967 (s. 5(1)(h)–(ha)), and constructing and managing a wide range of facilities and services on land and water to meet shipping and boating needs (s. 5(1)(i)). The latter category expressly lists port works, jetties, slips, moorings, launching ramps, navigation aids, and marine craft. A commercial development and promotion function attaches to these facilities (s. 5(1)(ia)). The Department must also preserve property vested in the Minister (s. 5(1)(j)) and perform any other consistent marine and port duties the Minister requires (s. 5(1)(k)).
Subsection 5(1A) imposes an important limitation: the Department cannot undertake port works (defined broadly in s. 5(2) to include piers, quays, breakwaters, reclamations, dredging, etc.) in a port under the Port Authorities Act 1999 without the relevant Port Authority's agreement. This reflects the post-1993 division of responsibilities.