1) Where an employee is employed in any agricultural undertaking on an estate on a contract of service under which he earns wages calculated by reference to the number of days' work performed in each month of his service, his employer shall be bound either to provide him with work suitable to his capacity on not less than twenty-four days in each month during the whole of which he is so employed, or if the employer is unable or fails to provide work on twenty-four days in each month whereon the employee is willing and fit to work, the employer shall nevertheless be bound to pay to the employee in respect of each of such days wages at the same rate as if such employee had performed a day's work;