Strikes and lockouts refer to cessation of work by employees or employers respectively. A strike involves a concerted refusal to work or accept employment by employees. A lockout is an act of hostility by employers where work is stopped. Strikes and lockouts can be justified or unjustified based on the facts and circumstances. Indian law places restrictions on strikes and lockouts in public utilities and during conciliation, arbitration or when a settlement is already in place. Illegal strikes and lockouts can result in penalties for employees and employers under the Industrial Disputes Act.