(a) To interfere with, restrain or coerce employes in the exercise of the rights guaranteed in this act.¹

(b) To dominate or interfere with the formation or administration of any labor organization or contribute financial or other material support to it: Provided, That subject to rules and regulations made and published by the board pursuant to this act, an employer shall not be prohibited from permitting employes to confer with him during working hours without loss of time or pay.

(c) 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 agreement approved or prescribed thereunder, or in any other statute of this Commonwealth, 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 employes, as provided in section seven (a) of this act,² in the appropriate collective bargaining unit covered by such agreement when made and if such labor organization does not deny membership in its organization to a person or persons who are employes of the employer at the time of the making of such agreement, provided such employe was not employed in violation of any previously existing agreement with said labor organization.

(d) To discharge or otherwise discriminate against an employe because he has filed charges or given testimony under this act.

(e) To refuse to bargain collectively with the representatives of his employes, subject to the provisions of section seven (a) of this act.

(f) To deduct, collect, or assist in collecting from the wages of employes any dues, fees, assessments, or other contributions payable to any labor organization, unless he is authorized so to do by a majority vote of all the employes in the appropriate collective bargaining unit taken by secret ballot, and unless he thereafter receives the written authorization from each employe whose wages are affected.

(a) To intimidate, restrain, or coerce any employe for the purpose and with the intent of compelling such employe to join or to refrain from joining any labor organization, or for the purpose or with the intent of influencing or affecting his selection of representatives for the purposes of collective bargaining.

(b) During a labor dispute, to join or become a part of a sit-down strike, or, without the employer's authorization, to seize or hold or to damage or destroy the plant, equipment, machinery, or other property of the employer, with the intent of compelling the employer to accede to demands, conditions, and terms of employment including the demand for collective bargaining.

(c) To intimidate, restrain, or coerce any employer by threats of force or violence or harm to the person of said employer or the members of his family, with the intent of compelling the employer to accede to demands, conditions, and terms of employment including the demand for collective bargaining.

(d) To picket or cause to be picketed a place of employment by a person or persons who is not or are not an employe or employes of the place of employment.

(d) To engage in a secondary boycott, or to hinder or prevent by threats, intimidation, force, coercion or sabotage the obtaining, use or disposition of materials, equipment or services, or to combine or conspire to hinder or prevent by any means whatsoever, the obtaining, use or disposition of materials, equipment or services.

(e) To call, institute, maintain or conduct a strike or boycott against any employer or industry or to picket any place of business of the employer or the industry on account of any jurisdictional controversy.