1. The American Institute of Architects (AIA) Document B101™–2017, Standard Form of Agreement Between Owner and Architect.
§ 3.2.5: "The Schematic Design Documents shall consist of drawings and other documents including a site plan, if appropriate, and preliminary building plans, sections and elevations..." (Supports A, B, C).
§ 3.2.6: "The Architect shall submit to the Owner an estimate of the Cost of the Work prepared in accordance with Section 6.3." (Supports E).
2. The American Institute of Architects, The Architect's Handbook of Professional Practice, 15th Edition.
Chapter 9.1, "Design Phases" (p. 598): This chapter outlines typical schematic design deliverables, stating they include "a site plan, floor plans, building sections, and exterior elevations." It also notes the architect provides a "preliminary estimate of the cost of the work." The text explicitly contrasts this with later phases where detailed material selections (finishes) and specifications are developed.