Yuva quota is only in two yuva express trains so far in the rail network.
It's for 15-45 yrs age unemployed person holding a certificate under NREGA or local Govt. Unemployment Exchange. Yuva quota is to the extent of 60% total AC Chair car seats and the rest is for all others / i.e. Non-yuva passengers. The Yuva epxress train is fully AC with only Chair Class seats.
@ No Yuva quotas in all the trains except two Yuva express trains.