It is NCR not Shady Sans... '-.-
NCR - New California Republic - that is name of Country like USA, Poland, Russia etc
SS - Shady Sands - name of City like Washington, Warsaw (Bitewna piła + 10 to all :p), Moscow etc
So if someone telling that he/she "I going to NCR", in my opinion is wrong because he/she is in NCR all time but when he/she telling 'I go to SS" it mean that he/she want to get to Capital City of NCR
There is one big fail in FO:2238, in "Fallout timeline" there is nowhere writen that HUB will join to NCR, in 2238 only Junktown joined to NCR, so we could imagine, that Hub will be Capital city other country, and maybe all "big cities" like SF, NR, VC, could create something like greek "polis", city-country, with diferent resources and goverment.