Following are the City of San Antonio's Administrative Directives for City employees. The files are in PDF format.The law we enforce gives employees the right to act together to try to improve their pay and working conditions, with or without a union. Stay up to date with Code Enforcement news. Additionally, the Act allows employers to request an exemption from paying the complete national minimum wage. San Antonio TX 78218. Directions. Phone: 210-335-2478. A Texas Hotel Occupancy Tax Exemption Certificate (PDF) must be filled out and retained for review at the hotel where the tax is collected. A Texas Hotel Occupancy Tax Exemption Certificate (PDF) must be filled out and retained for review at the hotel where the tax is collected. South African labour law regulates the relationship between employers, employees and trade unions in the Republic of South Africa.