Complex sentence: This was implemented as a requirement under The Maritime Archaeology Act of 1973.The act required that all areas of the sea-bed underneath jetties in Western Australia be designated as maritime archaeological sites if the jetty was used before 1900.
Split into simpler sentences: This was implemented as a requirement under The Maritime Archaeology Act of 1973. The Act required that all areas of the sea-bed underneath jetties in Western Australia be designated as maritime archaeological sites if the jetty was used before 1900.