Artifact GuideUK Online Safety ActRegulated Service Scope

UK Online Safety Act Regulated Service Scope

The Act regulates UK-linked user-to-user and search services under Part 3 and UK-linked services that publish provider pornographic content under Part 5.

Scope follows the service's functions and content flows. Exempt functions, mixed services, and separate provider-pornography duties must be recorded rather than collapsed into one product-wide label.

Author
Sorena AI
Published
May 9, 2026
Updated
Oct 15, 2026
Overview

A is a regulated user-to-user service, a regulated search service, or a UK-linked service that publishes or displays provider pornographic content. For Part 3, identify the user-to-user or search functionality, establish a UK link, and apply Schedules 1 and 2. For Part 5, identify pornographic content published or displayed by the provider and apply that Part's separate UK-link and age-verification rules.

Section 2

Who approves scope, and what evidence is needed?

Product and engineering should document how users create, upload, share, encounter, and search content. The provider's legal or regulatory owner should apply the Act to those facts and approve the boundary between regulated, exempt, and out-of-scope functions.

A useful scope record contains the provider entity, service map, user permissions, search sources, UK-link evidence, Schedule 1 analysis, provider-content analysis, decision date, reviewer, unresolved points, and specific reassessment triggers.

  • Name one accountable provider-side owner and one reviewer with access to the service facts.
  • Attach dated user journeys, permissions, architecture notes, UK user evidence, market targeting, and the text of every exemption relied on.
  • Explain partial-scope decisions at feature level so later risk assessments cover the correct content and users.
  • Reassess before launching a new user-content, messaging, search, pornography, or UK-market function.
Section 3

Which boundary cases need closer analysis?

Common boundary errors include treating all messaging as exempt, assuming comments or reviews are too limited to count, treating an entire combined product as one service, and using company size as a scope threshold.

The Schedule 1 descriptions are conditional. For example, one-to-one live aural communication is different from text, recorded audio, group communication, or a service that adds other user-to-user functionality.

  • Check whether comments and reviews are limited to provider-published content and whether the service provides any additional user-to-user functionality outside Schedule 1 paragraph 4.
  • Check whether a search engine searches one site, selected topic-specific sources under a relevant arrangement, or the wider public web; the category threshold exception for some vertical search is not a general Part 3 exemption.
  • Check internal-business, public-body, and education or childcare conditions instead of applying a sector-wide exclusion.
  • Treat child access and categorisation as follow-on duty tests, not reasons to exclude a Part 3 service.
Section 4

How should teams implement the service-scope decision?

Produce one approved service-scope memo with a separate conclusion for every relevant service part. Link each in-scope part to its illegal-content assessment, children's access assessment, safety controls, reporting and complaints procedure, and record-keeping owner.

If the service relies on an exemption, record the feature constraints that keep it within the exemption. A later design change can remove that factual basis even when the product name and provider remain the same.

  • Use the applicability test to reach the initial decision and the service-scope-and-categorization guide to map any threshold analysis.
  • Assign a named owner to each in-scope service part and each exemption constraint.
  • Keep the scope record with the risk assessments so Ofcom-facing evidence uses the same service boundary.
  • Review after any material change in functionality, users, UK availability, market targeting, or provider-published pornography.
Primary sources

References and citations

legislation.gov.uk3 citations
Referenced sections
  • Primary legislation for user-to-user, search, combined, and provider-pornography scope and the duties attached to each.
  • Sections 3 and 4 define Part 3 service types, regulated services, combined services, UK links, and the connection to Schedule 1; Part 5 covers provider pornographic content.
  • Primary source for scope, service-specific duties, records, and Ofcom's regulatory powers.
legislation.gov.uk3 citations
Referenced sections
  • Binding descriptions, conditions, and exceptions for exempt Part 3 services and functionality.
  • Binding exemptions for specified user-to-user and search services and functionality.
  • Full conditions and exceptions for the service descriptions that are exempt from Part 3.
ofcom.org.uk2 citations
Referenced sections
  • Current regulator guidance for applying the statutory scope sequence to service facts.
  • Current regulator guidance for recording service facts and applying the scope sequence.
legislation.gov.uk
Referenced sections
  • Separate scope and duties for services publishing or displaying provider pornographic content.
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