What conditions need to be met before a strike can be considered protected?

For a strike to be considered protected, it typically must be organized by a union representing workers and be aimed at improving working conditions, wages, or other employment terms. The strike must also comply with legal requirements, such as providing proper notice to the employer and being conducted peacefully. Additionally, the actions taken must be related to collective bargaining or grievances that affect the workers' rights or interests. Strikes that are deemed to be for unlawful purposes, such as violence or discrimination, are not protected.