42 CFR § 422.521 - Effective date of new significant regulatory requirements.

---
identifier: "/us/cfr/t42/s422.521"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "42 CFR § 422.521 - Effective date of new significant regulatory requirements."
title_number: 42
title_name: "Public Health"
section_number: "422.521"
section_name: "Effective date of new significant regulatory requirements."
chapter_name: "CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "MEDICARE PROGRAM"
part_number: "422"
part_name: "MEDICARE ADVANTAGE PROGRAM"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 1302, 1306, 1395w-21 through 1395w-28, and 1395hh."
regulatory_source: "63 FR 18134, Apr. 14, 1998, unless otherwise noted."
cfr_part: "422"
---


# 422.521 Effective date of new significant regulatory requirements.

CMS will not implement, other than at the beginning of a calendar year, requirements under this part that impose a new significant cost or burden on MA organizations or plans, unless a different effective date is required by statute.

[68 FR 50858, Aug. 22, 2003]