no
1. a. Federal compensation laws b. State compensation laws
Compulsory laws
I don't really understand this question. Are laws compulsory? Laws are laws and are certain not voluntary as to whether you obey them or not.
Workers compensation laws differ from country to country. The laws for hospitals do not differ very much from the workers compensation laws for other businesses.
internet and your local state office
In most states the employer MUST carry Workmens Comp. It's the law. Check with your local wage and hour or whatever it's called in your state. Workmens Comp protects employees while on the job and pays for the medical costs when an accident occurs while at work. On the other hand, if you're talking about health insurance, employers are not required to carry medical policies for employees but many employers do because it is a good way to keep valuable employees from seeking other employment.
Workers' compensation is a system of state and federal laws that provides benefits for workers who are injured on the job If you have a worker who is injured on the job, worker's compensation kicks in to provide benefits. The injury must occur in the "course and scope of employment." Not all employees are covered but most are. State laws vary greatly and they change frequently, so make sure to check the law in your state for information specific to your state.
history of workmen compensation
Worker's Compensation laws allow an injured employee to file a claim with the state or federal government instead of suing. However, employees are required to accept this compensation as an exclusive remedy for on-the-job illness or injury.
The question is very broad. However, workers compensation insurance is intended to provide a source of compensation for employees who are injured within the course and scope of their employment. Workers Compensation requirements differ by State, and you are best advised to consult the State statutes, or a workers compensation attorney, for specific advice.
Check the state laws in where the sole proprietor is being operated. It changes from state to state. For example in California requires workers' compensation if there is one employee. But if it is a sole owner with no employees then the insurance is optional. In Alabama and Florida if you have four employees including the owner, then workers' compensation is a must. In Texas workers' compensation is not required at all, but the state does require the employer to post a sign stating that workers' compensation will not be provided.