Service Employes International Union...has charged that Sodexo…has been engaging in unfair labour practices as set forth in the National Labor Relations Act…Respondent…[c]reated an impression among its employees that their union activities were under surveillance by Respondent; and…[t]hreatened its employees with discharge because they signed union authorization cards…Respondent…called the Tulane University Police Department in order to interfere with its employees organizing activities and to have Union organizaers removed from Tulane University’s property…Respondent promulgated the following rule: Employees must clock out before taking a break…Respondents promulgated the rule…to discourage its employees from assisting the Union or engaging in other concerted activities.