It shall be unlawful for any employment agency to receive as commission, directly or indirectly, for any information or assistance, any money or other consideration which is in value in excess of twenty-five percent (25%) of the amount earned, or prospectively to be earned by the person to whom such information or assistance is given during the first month of such employment; provided that the amount of such commission shall not be in excess of twenty-five percent (25%) of the amount actually prospectively to be earned in such employment, when it is mutually understood by the agent and the person when said information or assistance is furnished that said employment is for a period of less than one (1) month.