(2) A contract with an employee shall be in writing if the contract provides that the employee is to work outside the United Republic of. Tanzania. 15. Time of payment of wages.Labour laws labour code or employment laws are those that mediate the relationship between workers, employing entities, trade unions, and the government. Labour Relations Act. Foreign nationals seeking employment in Tanzania are required to obtain a work permit and residence permit. The Labour Commissioner issues a work permit. We are a full-service health department that performs many enhanced functions to address health inequities. Our services benefit all Houston residents. Learn what it's like to work for TNC firsthand from our employees' own experiences. Check Out the TNC Talent Playlist!