Every public service corporation engaged in transportation doing business in this state, employing as many as 50 or more employees, shall be required to make full payment to employees for services performed as often as once every two weeks, or twice during each calendar month, and such payment or settlement shall include all amounts due for labor or services performed up to not less than 15 days previous to the time of payment. Any public service corporation engaged in transportation who violates this section shall be guilty of a misdemeanor and upon conviction thereof shall be fined not less than $25.00 nor more than $250.00 for each offense, and each day's violation against each employee shall constitute a separate offense.