Make sure you contact your Legislative Council (Upper House) member. In particular Aaron Stonehouse for the South Metro.

Member List

http://www.parliament.wa.gov.au/parliament/memblist.nsf/WCouncilMembers?openform

From Sneakers Facebook page:

”Our legislation to put in place permanent protections for the Beeliar Wetlands has just passed the Legislative Assembly. In 2017, the community said it loud and clear - the Beeliar Wetlands must be protected. So we are making it law. It's now up to the Legislative Council to do the right thing and pass this Bill. However, the Liberals, Nationals and others are choosing to ignore the community’s views at the 2017 election and are opposing this legislation. If you believe the Beeliar Wetlands should be permanently protected, please join with us in showing your support for this Bill.”

https://m.facebook.com/story.php?story_fbid=3194625600555292&id=426913580659855