((Online Booking of tickets under SS quota - Lower berth quota ))
..... This is for the benefit of bloggers and passengers who are eligible for this privilege quota but depriving for want of info ...........(power of single booking)
Additional seats (quota - of lower berths) are available under SS quota code.
To obtain ticket under SS code , the passenger...
more...

has to satify following both the conditions.
a) Passenger is travelling alone. and
b) Age criterias - for females (above 45 yrs), for males (above 60 yrs)
Based on the details filled up on online booking page....
The system automatically considers any booking requisiton on the basis of 45+ female and 60+ male senior citizens travelling alone (single booking) for SS quota vacant berths.
In near future, a new specific tick mark Tab is expected to be introduced by IRCTC.
*** Note that ....There is no seperate tab provided for tick mark for SS quota.
**Obviously the age proof carrying for 45+ female passenger , during travelling is must to support her eligibility under this quota . The failure to produce age proof may entail fine to be imposed by TTE.
*** 60+ male /female passengers anyway comes under Senior citizen category for fare concession and age proof carrying must for them. In case 60+ male passenger has not tick marked for fare concession (available on demand) , he is still bound to produce age proof if he has obtained ticket under SS quota.