${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{w}as\text{p}\text{a}\text{s}\text{s}\text{e}\text{d}in1959to\text{h}\text{o}\text{l}\text{d}\text{p}\text{a}\text{r}\text{t}\text{i}\text{e}\text{s}\text{a}\text{c}\text{c}\text{o}\text{u}\text{n}\text{t}\text{a}\text{b}\text{l}\text{e}\text{a}\text{n}\text{d}\text{r}\text{e}\text{g}\text{u}\text{l}\text{a}\text{t}\text{e}\text{l}\text{a}\text{b}\text{o}\text{r}\text{u}\text{n}\text{i}\text{o}\text{n}\text{i}\text{n}\text{t}\text{e}\text{r}\text{n}\text{a}\text{l}\text{a}\text{f}\text{f}\text{a}\text{i}\text{r}\text{s}\text{.}}$

Question $10$ options:

The National Mediation Board

The National Labor Relations Act

The Labor Management Relations Act

The Labor$-$Management Reporting and Disclosure Act