Over the past 20 years, administrative, support and clerical workers have seen the UC system hold down their real wages by nearly 24 percent, the union says.
The new law protects poor women, women of color, and transgender individuals from discrimination.
Two large May Day marches converged upon downtown Los Angeles; the flow of marchers and supporters continued for miles.
Union density was 11.1 percent in 2014, the Bureau of Labor Statistics reported, but the workforce grew even more.
How unequal are women's wages? Women in the U.S., on average, are now paid only 77 cents to every $1.00 of men's average pay.
Everyone has the right to work, to free choice of employment, to just and favorable conditions of work and to protection against unemployment.
The special representative to the National War Labor Board issued a report setting forth provisions respecting wage rates for women working in war industries.