Here is what I found after some digging in more than 1 location -
"Exclusive Accommodation for Ladies, Sr. Citizen and Pregnant Women
.
i. An accommodation of six berths in sleeper class of all the trains is earmarked for exclusive use of lady passengers.
ii....
more... In addition to this a COMBINED quota of 2 lower berths is earmarked in sleeper class, AC 3-Tier and AC 2-Tier classes for Sr. Citizens, Female passengers 45 years of age and above traveling alone and pregnant women in all trains.
iii. Pregnant women will be required to submit a certificate of pregnancy certified by one registered Medical Practitioner at the time of booking against the quota."
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1. Reference one - Official Circular -
/315158/14364938/cc462. NCR section of IR website -
click here3. Indian Rail PDF regarding facilities for senior citizens -
click here4. Press Release by Indian Rail -
click here.
This COMBINED 2 berth quota seems to have been increased from 2 to 4 berths in SL coaches but again there is no reference of separate allocation for Senior Citizens. References below -
1. Indian Express News article -
click here2. Hindu news article -
click here