---
kind: "unit"
title: "17"
title_heading: "Commodity and Securities Exchanges"
key: "chI/part21"
level: "part"
label: "Part 21"
heading: "Special Calls"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/17/chI-part21"
sections_count: 7
---

# Part 21 — Special Calls

Title 17 C.F.R. — Commodity and Securities Exchanges › Chapter I — Commodity Futures Trading Commission

## Sections

- [§21.00. Preparation and transmission of information upon special call.](/cfr/17/21.00.md)
- [§21.01. Special calls for information on controlled accounts from futures commission merchants, clearing members and introducing brokers.](/cfr/17/21.01.md)
- [§21.02. Special calls for information on open contracts in accounts carried or introduced by futures commission merchants, clearing members, members of reporting markets, introducing brokers, and foreign brokers.](/cfr/17/21.02.md)
- [§21.03. Selected special calls-duties of foreign brokers, domestic and foreign traders, futures commission merchants, clearing members, introducing brokers, and reporting markets.](/cfr/17/21.03.md)
- [§21.04. Special calls for information on customer accounts or related cleared positions.](/cfr/17/21.04.md)
- [§21.05. Delegation of authority.](/cfr/17/21.05.md)
- [§21.06. Delegation of authority to the Director of the Division of Clearing and Risk.](/cfr/17/21.06.md)