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Regulations for Curbing Spam Messages and Calls (RC01 v3)

Consent, opt-out and sender rules for SMS and call marketing

Type	Regulation
Code	RC01
Issuing authority	Communications, Space & Technology Commission (CST)
Framework	Telecommunications & ICT
Tier	Implementing & executive regulation
Legal status	In force
Instrument number	CST decision 493/1444 · Communications, Space and Technology Commission
Issued	2022-10-17
Version	3
Dates	CST decision 493/1444, 17 October 2022; in force
Last verified	2026-10-20

CST's Spam Regulations govern promotional SMS and calls. They bind telecom service providers and senders of marketing messages.

• Consent: express opt-in; consent may not be buried in contracts or privacy policies.
• Opt-out: stop within 24 hours and confirm.
• Sender ID: promotional senders carry the "-AD" suffix; no promotional SMS from mobile numbers.
• Quiet hours: 22:00–09:00.
• PDPL: they apply alongside PDPL Implementing Regulation (IR) Arts 28–29. The October 2026 draft IR amendments remove the IR's reference to the Telecommunications and IT Act, so the two regimes run in parallel.
• Link to the sector law: Telecommunications and IT Act Implementing Regulations Art 79(1)(f).

Documents

• Official source (www.cst.gov.sa)

In this framework

• Telecommunications and Information Technology Act
• Organisation of the Communications, Space and Technology Commission (as amended)
• Implementing Regulations of the Telecommunications and IT Act
• Regulations of User Rights Protection Rules
• Regulations for Providing Digital Content Platform Services
• Internet of Things Regulations (RT18 v3)
• Telecom Infrastructure Risk Management Regulations (v2)
• Space Sector Regulations and Guidelines (draft)
• CST licensing and registration (index)
• Cybersecurity Regulatory Framework (CRF) for ICT Service Providers (Second Version)

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Content and register data licensed CC BY 4.0. Cite the live URL. Machine-readable register (JSON) · Markdown register · Content last verified: 2026-10-21