Employees who are members of EPF will automatically become the members of EPS.
Along with employer contribution of 8.33%, Central Govt. also contributes 1.16% of employees’ monthly salary. Here the meaning of salary means Basic+DA. The rulebook still sticks to the old salary limit of Rs.6, 500 limits for an employer and central government contribution. However, after the new rules, the limit should be raised to Rs.15, 000.
The pensionable service is determined by the number of years the employer contributed on behalf of employee.you. If the employer failed to deposit the amount then such months are not considered for calculation of service. In your mother's case she became member of EPF in 1994 and started making contributions to the fund . In your mother's case her membership was calculated at 9 years 4 months and hence may not be eligible for pension To avail such pension, your mother should have completed 10 years of service and her age to be between 50 yrs to 58 yrs. To avail such early pension, an employee must not be working.
However you may file a writ to consider your case on humanitarian grounds in view of her past services with the employer.