SEC. 7. Employees shall have the right of self-organization, to form, join, or assist labor organizations, to bargain collectively through representatives of their own choosing, and to engage in concerted activities, for the purpose of collective bargaining or other mutual aid or protection.
SEC. 8. It shall be an unfair labor practice for an employer-
(1) To interfere with, restrain, or coerce employees in the exercise of the rights guaranteed in section 7.
(2) To dominate or interfere with the formation or administration of any labor organization or contribute financial or other support to it: Provided, That... an employer shall not be prohibited from permitting employees to confer with him during working hours without loss of time or pay.
(3) By discrimination in regard to hire or tenure of employment or any term or condition of employment to encourage or discourage membership in any labor organization: Provided, That nothing in this Act or in any other statute of the United States, shall preclude an employer from making an agreement with a labor organization (not established, maintained, or assisted by any action defined in this Act as an unfair labor practice) to require as a condition of employment membership therein, if such labor organization is the representative of the employees in the appropriate collec tive bargaining unit covered by such agreement when made.
(4) To discharge or otherwise discriminate against an employee because he has filed charges or given testimony under this Act.
(5) To refuse to bargain collectively with the representatives of his employees.