Which of the following statements is true of the Equal Pay Act of $1963?$

It states that tasks performed only intermittently or infrequently make jobs different enough to justify different wages.

It requires employers to offer equal pay for all employees irrespective of their seniority$.$

It states that the existence of pay differences in jobs held by women and men is sufficient to prove that illegal discrimination has occurred in the workplace.

It requires employers to pay similar wage rates for similar work without regard to gender.