Dear Lucille,
There is no such provision for deduction of salary on account of gratuity, Gratuity is paid to the employee after completion of 5 years in the organisation for his good behavior in the organisation, Employee is eligible for gratuity after completion of 5 years only, If the employer is deducting some amount from the salary on account of gratuity, if any employee left the organisation before completion of 5 years then how he will pay to the employee.
Employer is not eligible to deduct from the salary any amount on account of gratuity.