{"data":{"id":"us/42-cfr-423.516","jurisdiction":"us","citation":"42 CFR 423.516","heading":"Prohibition of midyear implementation of significant new regulatory requirements.","body":"CMS may not implement, other than at the beginning of a calendar year, regulations under this section that impose new, significant regulatory requirements on a PDP sponsor or a prescription drug plan.","path":["Title 42—Public Health","CHAPTER IV—CENTERS FOR MEDICARE \u0026 MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER B—MEDICARE PROGRAM","PART 423—VOLUNTARY MEDICARE PRESCRIPTION DRUG BENEFIT","Subpart K—Application Procedures and Contracts with Part D plan sponsors"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-42.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:11Z","sha256":"fcd715b8442105c31e35a9efca6b7241dcdfeede84b71fcdefa2e54b516606d3","source_id":"us-cfr","stale":true,"prev":"us/42-cfr-423.514","next":"us/42-cfr-423.520"},"notice":"GroundRules: Original legal text. Not legal advice."}