The employer is prohibited from: Interfering with, restraining or coercing employees in the exercise of their rights of self-organization or non-organization. Encouraging or discouraging membership in an employee organization by discrimination in regard to hire, tenure, promotion, or other conditions of employment; provided, that nothing in this law shall preclude the employer from including in a memorandum of understanding with an employee organization certified as the exclusive representative of employees pursuant to § 4-3 hereof, a provision whereby all employees who elect not to join, or remain members of, the employee organization certified in their respective bargaining unit, unless otherwise indicated in the Fiscal Year 1996 Memorandum of Understanding applicable to their bargaining unit, shall be required, as a condition of employment, to pay a service fee to the certified employee organization and to have such fee automatically deducted by the employer from their paychecks as provided in § 6-2 hereof. Controlling or dominating an employee organization or contributing financial or other support to it. Refusing to negotiate in good faith with a certified employee organization. City Code, 1976/83, art. 1, §131(2nd par.) Ord. 68-251 Ord. 75-993 Ord. 96-067