Labor Law and Social Legislation › Labor Relations
D. Rights, Terms, and Conditions of Union Membership
SECOND ULP: YELLOW DOG (ART. 259 [B])
To require as a condition of employment that a person or an employee shall not join a labor organization or shall withdraw from one to which he belongs
Yellow Dog Contract: A promise exacted from workers as a condition of employment that they are not to belong to, or attempt to foster, a union during their period of employment (Azucena Vols. II-A and II-B, 9th ed., 2016, p. 329).