Keeping in view the following rule you are eligible

(ii) A candidate who has obtained a Third Division (or ‘D’
grade) in his/her Bachelor’s Degree will be eligible for the
Examination in cases where he/she has obtained a higher Division
in Master’s Degree.

upper age limit--- 28 years (upper age limit will be relaxed by two years up to the age
of 30 years in some cases)
Last date of application for CSS 2012 is 31st december 2011