The SPLA command is implementing the security arrangement by pulling out of Juba, announces the spokesman on Monday.
Today about 250 soldiers are redeploying to Mogiri area, Colonel Philip Aguer says.
Mogiri is about 25 kilometres along the Juba-Bor road, Radio Bakhita reports.
Colonel Aguer says the redeployment will continue gradually.
Government is still fixing socio-economic infrastructures like boreholes in other areas for remaining forces, the spokesman explains.
The peace deal security arrangement requires demilitarization of Juba City and other major towns.