Work Interruptions {Ans: Strikes, picketing, blue flu (police officers who are prohibited from striking and so they call off in mass numbers), rolling strikes (employees at one location used by a single employer will strike for a day or a week and then return to work, wherein a different group of employees will then strike at a different employer location)}Union Shop {Ans: Requires that an employee, as a condition of employment, become a member of the union within a stipulated period, usually 30 or 60 days, after being hired or after the effective ate of the CBA}Categories of employees in relation to Unit Determination {Ans: -Management employees -Confidential employees -Supervisors -Professional employees}Railway Labor Act (RLA) of 1926 {Ans: Gave railroad employees the right to organize and bargain collectively through representatives of their own choosing}Ratification {Ans: Process by which union members vote to accept the terms of a negotiated labor agreement}Norris-LaGuardia Act {Ans: Guaranteed workers some rights to organize and restricted the issuance of court injunctions in labor disputes; prohibited employers from asking employees to sign yellow dog contracts}