This blog post describes the reasons Ordering Officers sometimes need to include clauses from the FAR or from their agency's FAR Supplement in Schedule task orders.  When we say that ordering agencies may add "non-conflicting" clauses to their orders, what do we mean? 

See:
http://contacts.gsa.gov/blogs/servicesordering.nsf/dx/add-clauses-to-orders?opendocument&comments

GSA Multiple Award Schedule MAS FSS Federal Supply Schedules service services task order orders ordering professional services clauses clause RFQ provision provisions FAR Supplement