The NCIDQ IDPX exam tests the designer’s understanding of professional practice, particularly the scope of an independent interior designer’s authority to seal drawings. Sealing drawings indicates that the professional takes legal responsibility for the design, and this authority varies by jurisdiction.

Option A (In combination with an architect’s seal on construction documents):An independent interior designer’s seal does not typically need to be combined with an architect’s seal unless required by local statute. This option implies a dependency that is not standard for non-structural work.

Option B (On the life-safety section of the construction documents):Life-safety sections (e.g., egress plans, fire-rated assemblies) often require an architect’s or engineer’s seal due to their impact on building safety. An independent interior designer may not have theauthority to seal these sections unless specifically permitted by jurisdiction, which is rare.

Option C (In combination with a structural engineer’s seal):Structural engineers seal structural drawings, which are outside the interior designer’s scope. An interior designer’s seal would not typically be combined with a structural engineer’s seal, as their scopes are distinct.

Option D (On non-structural interior construction documents):This is the correct choice. In jurisdictions where interior designers are permitted to seal drawings (e.g., states with title or practice acts for interior designers), an independent interior designer can seal non-structural interior construction documents, such as partition plans, finish schedules, or reflected ceiling plans. This reflects their scope of practice, which focuses on non-structural elements, as defined by the NCIDQ and jurisdictional statutes.

Verified Answer from Official Source:

The correct answer is verified from NCIDQ’s official study materials on professional practice and jurisdictional authority.

“Where allowed by jurisdictional statute, an independent interior designer’s seal is acceptable on non-structural interior construction documents, reflecting their scope of practice.” (NCIDQ IDPX Study Guide, Professional Practice Section)

The NCIDQ IDPX Study Guide confirms that an independent interior designer’s seal is appropriate for non-structural interior construction documents in jurisdictions that permit it. This aligns with Option D, making it the correct answer.

Objectives:

Understand the scope of an interior designer’s authority to seal drawings (NCIDQ IDPX Objective: Professional Practice).

Apply jurisdictional knowledge to professional responsibilities (NCIDQ IDPX Objective: Codes and Standards).