Dear Geeti,
Let me put it this way, as per rules, if an employee has accumulated leave or is entitled to take leave, he/she can avail it with prior sanction. On the other hand, if the employee does not have any accumulated leave, it is totally up to the company to decide whether to give him/her special leave sanction. As the name "special" suggests, it is solely up to the management to decide to whom it should be given and to whom it should not be given on a case-by-case basis, without creating a precedent. Most reputed companies follow a uniform policy and grant these leaves on a case-by-case basis depending upon the urgency and genuineness of the case. It is not only for marriage but also applies to death cases. Some companies I know even ask whether the employee has any plans to get married in the near future.
Regarding Samvedan:
"Normally, the terms and conditions are uniformly applicable to all employees or at least to employees in the same class of employment. Therefore, to grant this kind of entitlement to unmarried employees could be construed as differentiation with no justification by the married employees, and such differentiation would lead to stress in the organizational situation. Perhaps for this reason, employers generally avoid extending such fancy privileges."
I wish to say that married employees understand the situation very well, and I have never seen them putting forth any reservations regarding special leave for marriage. Some employees will always be there who have a problem with everything, but the majority of them are sane, helpful, and reasonable. In the end, as Samvedan is saying, if married employees have reservations in the case above, it is an indication that your workforce is not happy with the company and is raising issues to voice their concerns.
Regards,
SC