When is the deadline for cma notice of whether it is investigating (s.101 claims)?
The catalogue records a 28 days period from The CMA receiving a copy of the claim form sent under rule 33(7). This draft page remains free only until its source, worked example and limits are reviewed.
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In preparation
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Example pending review
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Calculation basis and source
- Period
- 28 days
- Trigger
- The CMA receiving a copy of the claim form sent under rule 33(7)
- Counting
- The encoded calculator method must be independently documented before publication.
- Rollovers and holidays
- Holiday, closure and order treatment must be independently documented before publication.
This route remains in preparation until a pinpoint official source is recorded.
- A procedural obligation on the regulator with no sanction attached in the rule, and extendable under the Tribunal's general case-management powers. Note that rule 72D(1)(b) expressly contemplates the CMA deciding to investigate at any later time before the proceedings conclude, so the 28-day answer is not final.
- CURRENCY: Part 4A (rules 72A to 72F) was inserted by the Competition Appeal Tribunal (Amendment) Rules 2025 (SI 2025/999) and came into force on 1 October 2025. This is new machinery and there is little practice yet. It applies to claims under DMCC Act 2024 s.101 (rights to enforce requirements of Part 1) against undertakings with strategic market status. The claimant's trigger