RFP appendix vs. attachment

Canadian federal bid solicitations are built from labelled pieces — Parts, Annexes, Appendices and Attachments — and unlike "addendum," these labels have no single fixed statutory definition. What each one carries is set by the solicitation document itself, so the definitions and instructions inside your RFP always control.

The labels PSPC actually uses

Public Services and Procurement Canada's own guidance on reading solicitation documents (Seminar notes: Bidding on opportunities, on canada.ca) describes the role of annexes: "Annexes can include any specifications that aren't covered in the other sections of the solicitation, such as a detailed statement of work, security requirements, non-disclosure agreements, details about the evaluation criteria, geographic regions, corporate profiles and authorization letters."

The same layering shows up in live instruments. A PWGSC National Master Standing Offer solicitation on the federal standing-offer site is described as "divided into seven parts plus attachments and annexes," with the Statement of Requirement, Basis of Payment, Insurance Requirements and Utilization Report carried as Annex "A" through Annex "D" — i.e., the requirement content sits in annexes, while the numbered Parts carry the instructions, evaluation procedures and clauses.

Where appendices and attachments fit

In issued documents, "Appendix" typically drills down one level inside an annex or section — real CanadaBuys RFPs contain headings like "APPENDIX A TO ANNEX A," and bidder question-and-answer documents reference appendices inside an annex that bidders must complete. "Attachment" tends to flag a document appended for use rather than restated in the body — for example, a federal Q&A on a defence solicitation refers to compliance with the articles of Attachment "4.1," described as the requested format. So the practical convention: annexes carry requirement content, appendices are sub-documents within them, and attachments are appended items (often forms or formats) you respond to or return.

No fixed hierarchy — read the document

Because no federal statute or regulation assigns these labels a fixed meaning, two solicitations from different departments can use the same word differently. Two safeguards: (1) check the solicitation's own structure — most federal documents state which parts, annexes, appendices and attachments form an integral part of the solicitation; and (2) note that since June 2024, PSPC solicitations follow a modernized format under the Contract Modernization Initiative in which all terms are spelled out within the document, replacing much of the legacy SACC Manual cross-referencing (which CanadaBuys keeps available as an archive).

Common questions

Does an appendix have the same binding force as the main RFP body?

Yes when the solicitation says it forms part of it — and a properly issued solicitation will say so for its annexes, appendices and attachments. The binding force comes from the document's own incorporation language and, later, the resulting contract, not from the label on the cover page.

How is this different from an addendum?

An appendix or attachment is part of the original solicitation package; an addendum is issued after the solicitation, to modify or supplement it before closing. If an annex, appendix or attachment is changed mid-process, that change is distributed as an addendum.

What if two documents conflict?

Use the order-of-precedence clause in the solicitation — federal documents specify which document prevails on conflict. If the precedence clause doesn't resolve your question, the bidder question period exists precisely for that.

Related definitions

RFP · Addendum · Addendum vs. amendment · Evaluation criteria weighting