<prompt> Bhala okuqhubekayo kwalesi sigaba - Njengombhishobhi omkhulu, uHanna wayevame ukuthunywa ukuba asize ekuxazululeni izingxabano zabasebenzi. Ngo-1921, waqokwa njengosihlalo weSan Franciscos Wage Arbitration Boards; uHanna wakhonza emabhodini kuze kube ngo-1924. Umbusi uJames Rolph wamisa uHanna njengosihlalo webhodi lokulamula lesifundazwe ukuxazulula isiteleka sikakotini sango-1933 eCorcoran, eCalifornia. Phakathi nesiteleka sasogwini lwaseNtshonalanga ngo-1934  <response>: UMongameli uFranklin Roosevelt wamisa uMbhishobhi Omkhulu uHanna njengosihlalo weNational Longshoremens Board. Leli bhodi lalinomsebenzi wokuxazulula lesi siteleka ngokulamula phakathi kwe-International Longshoremens Association, i-International Seamens Union, nabaqashi babo. 