Section 6. Article 249 of the Labor Code, as amended, is further amended by deleting paragraph (i), and renumbering paragraph (j) as paragraph (i), as follows:

"Art. 249. Unfair labor practices of employers. — It shall be unlawful for an employer to commit any of the following unfair labor practices:

"(a) To interfere with, restrain or coerce employees in the exercise of their right to self-organization;

"(b) To require as a condition for employment that a person or an employee shall not join a labor organization or shall withdraw from one to which he belongs;

"(c) To contract out services or functions being performed by union members when such will interfere with, restrain or coerce employees in the exercise of their right to self-organization;

"(d) To initiate, dominate, assist or otherwise interfere with the formation or administration of any labor organization, including the giving of financial or other support to it or its organizers or officers;

"(e) To discriminate in regard to hire or tenure of employment or any term or condition of employment in order to encourage or discourage membership in any labor organization. Nothing in this Code or in any other law shall prevent the parties from requiring membership in a recognized collective bargaining agent as a condition for employment, except of those employees who are already members of another union at the time of the signing of the collective bargaining agreement. Employees belonging to an appropriate collective bargaining unit who are not members of the recognized collective bargaining agent may be assessed a reasonable fee equivalent to the dues and other fees paid by members of the recognized collective bargaining agent, if such non-union members accept the benefits under the collective agreement: Provided, That the individual authorization required under Article 242, paragraph (o) of this Code shall not apply to non-members of the recognized collective bargaining agent;

"(f) To dismiss, discharge, or otherwise prejudice or discriminate against an employee for having given or being about to give testimony under this Code;

"(g) To violate the duty to bargain collectively as prescribed by this Code;

"(h) To pay negotiation or attorney's fees to the union or its officers or agents as part of the settlement of any issue in collective bargaining or any other dispute; or

"(i) To violate a collective bargaining agreement.

"The provisions of the preceding paragraph notwithstanding, only the officers and agents of corporations, associations or partnerships who have actually participated in, authorized or ratified unfair labor practices shall be held criminally liable."