Coordinate Structure Constraint

In generative syntax, Coordinate Structure Constraint is a constraint on movement proposed in Ross (1967) which says that


 * In a coordinate structure, no conjunct may be moved, nor may any element contained in a conjunct be moved out of that conjunct.

Examples
The CSC explains the ungrammaticality of (i) and (ii).

(i) * which professor did you divide the cake between [ Mieke and t ]

(ii) * which book did you [VP [VP steal t from Ger] and [VP give the paper to Jacqueline] ]

These examples violate the first and the second clause of the CSC, respectively.

Comment
Well-known exceptions to the CSC are Across-the-Board extractions.

Link
Utrecht Lexicon of Linguistics