Dear Mr. Arbind,
The special Allowance in your case should be construed as DA as 17@ of the salary package mentioned by you should be deary the cost of living ( even though there was no mechanism to arrive at this figure as in the case of unionized employees who are enjoying the Dearness allowance based on the mechanism of local cost of living /All India consumer price as the case may be,
The allocation of major portion of gross salary in the name of Special Allowance may be to circumvent the definition of salary under payment of gratuity act 1972 in as much as to lessen the employers financial commitment to gratuity to employees specially senior executives in management cadre . It is understandable that and logically tenable to allocate reasonable portion( %) of gross salary into HRA ( up to 50%) , Conveyance Allowance , City compensatory allowance, Dress/washing allowance etc etc. Bereft of all these allowance , a single component styled as Special Allowance with considerable percentage of gross salary is a point at dispute .
The issue reckoning of Special Allowance as part of salary in addition to Basic Salary has to be taken up with controlling Authority under payment of gratuity act 1972 for a final decision, If the Contorting authority negatively your representation , then the issue to be taken with Appellate Authority. There is strength in your case . The employer cannot take to interpretation of salary definition on the basis of the just letters of the payment of the gratuity act 1972 . In fact it should be taken into spirit and logical conclusion and I am sure the Courts can view this social security legislation in a more pragmatic ,logical and analytical manner and you have bright chances of success. I am not in position to lay my hands on judicial pronouncement / case law in this regard .
Let other experts through lights in this regard.