Master Data transfer from SAP R/3 to SAP GTS

[sapsd73]

HI,

Master data like customer master is transferred fro R/3 to GTS. Any customer master in R/3 has many fields like company code, sales area, shipping conditions etc.

Shipping conditions and other fields are not defined in GTS. So how come when the customer master which is copied into SAP GTS is not giving any error since certain fields like shipping conditions are not there in GTS. I mean there are certain validation in R/3 for a customer . So how come these validations are being done in SAP GTS ??

regards