The proposed bill aims to protect workers facing employment loss due to business closures or mass layoffs by establishing a new chapter in Title 49 RCW. It defines key terms such as "affected employee," "aggrieved employee," "business closing," and "mass layoff," and outlines the responsibilities of employers regarding notification. Specifically, employers must provide written notice to affected employees and the employment security department at least 60 days prior to a business closing or mass layoff. The bill also stipulates that employers are liable for back pay and benefits to aggrieved employees if they fail to provide the required notice.

Additionally, the bill includes provisions for civil penalties against employers who do not comply with the notice requirements, as well as mandates for the continuation of group health insurance for affected employees and their dependents. The employment security department is tasked with enforcing these provisions and may adopt rules to ensure compliance. The act is officially titled the "Securing Timely Notification and Benefits for Laid-off Employees Act" and includes a severability clause to maintain the validity of the remaining provisions if any part is found invalid.