Progress in Precison Nuclear PDFs:

Proper treatment of nuclear effects are essential to extract precison

Parton Distribution Functions (PDFs) which characterize the nuclear

structure.  Recent improvements and new data sets have enabled

significant advances of both nuclear corrections and flavor

differentiation. Specifically, recent JLab data probes the hi-x

region, semi-inclusive hadron production provides new constraints on

the gluon, and LHC electroweak processes are sensitive to the strange

quark.  We review the current status of the nCTEQ distributions, and

consider the potential impact of future EIC data.