Problem in INCOTERMS.......

Please provide me with the reasons why INCOTERMS is always defined in Sold

to Party & not Ship to party.

See, If a SO is made to particular Customer of (New Delhi) having numbers

of ship to address which are at far locations like faridabad, Agra Etc,

then

in sale order sold to party has to be one but ship to party should be the

deciding factor for Incoterms Pick Up.

But i guess this doesn't happens???

Incoterms Picked up from SOLD TO PARTY.

Please tell why so???