FMLA eligibility guidelines
Labor law generally includes laws that relate to unionization, union activity and other concerted activities by employees in the workplace. Labor law mostly applies to the National Labor Relations Act and the Railway Labor Act. Two federal laws that apply in Texas. Many people refer to all labor and employment law as labor law. The distinction is not really important to the practice of labor or employment law.
Both labor law and employment law deal with the employer-employee relationship albeit in a different way. It does not really matter whether you think a claim under the National Labor Relations Act is labor or employment law but it can be helpful to understand the distinction commonly made by attorneys, judges and legal documents.