"17. The petitioner contends that if the minimum service for entitlement to retiring pension was 20 years and not 10 years, Rule 43(2) would not have stated "qualifying service of not less than 10 years". He contended that as Rule 43(2) of the TNP Rules (Rule 49(2)(b) of CCSP Rules) refers to "not less than 10 years service", any government servant who has put in service of 10 years or more is entitled to retiring pension. The said contention is misconceived. As stated earlier, the said rule does not relate to entitlement' of pension nor does it prescribe the conditions for eligibility, but only provides how the amount of pension should be calculated in cases where the retiring Government servant is entitled to pension under the chapter V of the pension rules. The said Rule regulates the amount' of pension not only in case of retiring pension, but in case of all classes of pension. Under Chapter V, in certain situations, a Government servant may be eligible for pension even where the service is less than ten years. Rules 32, 36, and 38 of TNP Rules (Rules 35, 38 and 39 of CCSP Rules) do not prescribe any minimum service for being entitled to pension, where the cessation of service is on account of superannuation, or on account of bodily or mental infirmity or on account of abolition of his post. When Rule 43(2) of TNP Rules (Rule 49(2)(2) of CCSP Rules) refers to payment of pension to a person who has a qualifying service of not less than 10 years, it does not mean that the minimum period of service prescribed for retirement pension is reduced to 10 years or that government servants who are dismissed/removed/ compulsorily retired by way of punishment, or those who voluntarily retire before reaching the age of superannuation with less than 20 years of qualifying service, become entitled to pension. Rule 43(2) of TNP Rules (Rule 49(2)(b) of CCSP Rules), as noticed earlier, comes into play only when the Government servant is entitled to any of