Sir I went a dept training and returned back today. And I asked the experts (AG office) about Double TA. They told me as per following:
6th Pay Commission: Transport Allowance
If a Govt Servant whose Grade Pay below Rs.4200 and pay in Pay band below Rs.7440 /-
then Transport Allowance admissible per month is Rs.600 + DA for Classified Cities (Annexure - I) and Rs.400 + DA for All Cities/Towns/Other than those included in Annexure - I)
For Physically handicapped, if the GS whose Grade Pay < 4200 and pay in pay band below Rs.7440. His Transport Allowance is : 400 x 2 = 800 + DA (other cities). It is not correct. As per rules Minimum of Transport Allowance is fiexed for PH that is Rs.1000 + DA (instead of 800 + DA). (Suppose the GS in working in Annexure I cities then his TA will be Rs.600 x 2 = 1200 + DA (and not Rs.1000 + DA ).
7th Pay Commission: Transport Allowance
If a Govt Servant whose Pay is Level 1 (GP 1800) and Level 2 (GP 1900) (and working in TPTA Cities - it should be 1350 + DA (for Double TA 2650 + DA). The same for Other cities it should be 900 + DA (for Double TA 2250 + DA and not 1800 + DA because minimum TA should be Rs.2250).
If a Govt Servant whose BasicPay (24200 and above) in Level 1 and Level2 , and working in TPTA Cities - it should be 3600 + DA (for Double TA 7200 + DA). The same for Other cities it should be 1800 + DA (for Double TA 3600 + DA and not 2250 + DA).
Ahmedabad(UA), Bengaluru(UA), Chennai(UA), Coimbatore(UA), Delhi(UA), Ghaziabad(UA), Greater Mumbai(UA), Hyderabad(UA), Indore(UA), Jaipur(UA), Kanpur(UA), Kochi(UA), Kolkata(UA), Kozhikode(UA), Lucknow(UA), Nagpur(UA), Patna(UA), Pune(UA), Surat(UA))
Thank you all for kind guidance.