In CSI-based project delivery and typical general conditions (such as those coordinated with CSI practices), contract documents are described as “complementary”. This means the drawings, specifications, and other contract documents are intended to be read together as a unified whole, and requirements shown or stated in one document are binding as if they appeared in all.
CSI’s CDT body of knowledge and practice guides explain that:
The project manual (including the specifications and conditions of the contract) and the drawings together form the contract documents used to describe the work.
These documents are interrelated and mutually supportive; no single document is intended to stand alone.
The concept of “complementary” means that if a requirement is found in any contract document, it applies, unless it has been consciously modified by a change in the contract (e.g., via addenda, change order, or supplementary conditions).
Therefore, statement A. Contract documents are complementary reflects the core CSI teaching on how contract documents function together.
Why the other options are incorrect (from a CSI/CDT perspective):
B. Requirement of one of the contract documents may be superseded by othersCSI teaches that the contract documents should be coordinated, not competing. While modifications can be made through proper instruments (addenda, change orders, supplementary conditions), the baseline rule is not that any document “supersedes” another by default. Instead, the emphasis is on coordination and consistency across the entire set of documents. Precedence is only established where explicitly written into the conditions or supplementary conditions, and even then it is a last resort, not a standard operating principle.
C. Specifications take precedence over drawingsCSI specifically cautions against blanket “order of precedence” clauses (such as “specifications govern over drawings”), because they encourage sloppy coordination and can lead to disputes rather than preventing them. CSI promotes the idea that both drawings and specifications must be coordinated so they do not conflict. While some owners or agencies may include precedence clauses in their own conditions, this is not a CSI best practice and is not the general rule taught in CDT-preparation materials.
D. The architect/engineer may require the contractor to perform at a higher level than the contract documents requireUnder standard contract principles presented in CSI’s practice guides, the architect/engineer (A/E) cannot unilaterally change the contractor’s obligations beyond what the contract documents require, except through properly authorized changes (e.g., change orders) that include appropriate adjustments to cost and/or time if applicable. The A/E administers the contract and interprets the documents but cannot simply demand higher performance than what the contract documents specify without formal change mechanisms.
In summary, the CSI-aligned view is that contract documents are complementary and intended to be interpreted together, which is best represented by Option A.
