# Practice and Procedure, CORES Registration System
> **Federal Communications Commission** · Final rule. · Published 2021-10-29 · Effective 2021-11-29 · 86 FR 59858
## Document
- **Document number:** 2021-20544
- **Category:** other
- **Federal Register citation:** 86 FR 59858
- **CFR reference:** 47 CFR 1
- **Publication date:** 2021-10-29
- **Effective date:** 2021-11-29
- **FCC docket:** MD Docket No. 10-234
## Abstract

In this document, the Federal Communications Commission (Commission) adopts a Report and Order to require entities and individuals doing business with the Commission to provide a valid email address when they register for FCC Registration Numbers (FRNs) and to keep the email information current along with other information used to register.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/10/29/2021-20544/practice-and-procedure-cores-registration-system)
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