The bill amends RCW 9.41.300 to restrict the possession of weapons in specific public places, including libraries, zoos, aquariums, and transit facilities, while allowing individuals with a concealed pistol license to carry firearms in these locations. The new provisions explicitly state that it is unlawful for any person to knowingly possess a weapon on the premises of a library, zoo, aquarium, or transit facility, with the definitions of these locations provided in the bill. Additionally, the bill outlines that local legislative authorities must provide secure storage options for weapons during visits to restricted areas and clearly mark areas where weapons are prohibited.

Furthermore, the bill includes various exemptions, such as for law enforcement personnel and employees of the specified facilities when engaged in their official duties. It also clarifies that the restrictions do not apply to individuals licensed to carry concealed firearms. The bill establishes penalties for violations, categorizing them as gross misdemeanors, and reinforces the definition of "weapon" to include firearms and other dangerous instruments. Overall, the legislation aims to enhance public safety by limiting weapon possession in sensitive public spaces while accommodating lawful concealed carry.