OLYMPIA, Wash. (AP) —Boaters approaching any of the Puget Sound’s orca whales may face a fine in the future, if a proposed measure in Olympia passes.

The measure, sponsored by Rep. Dave Quall of Mount Vernon, aims at stopping people from harassing orcas in the sound. The population, known as the southern residents, lives year-round in the sound and is considered endangered.

According to the bill’s language, a boater “knowingly approaching” and getting within 300 feet of an orca whale could face a fine. The measure was inspired by an ordinance passed by San Juan County in 2007 with similar language.