Spam SMS Limitations Controls
The phenomenon of spam messages has a negative impact on the means of electronic communication, which is a major inconvenience and threat to users of telecommunications services. In this regard, the Communications and Information Technology Commission (CITC) issued Decision No. 395/1439 AH dated 3/11/1439 AH adopting the limits of SPAM. The controls included the mechanisms that enable users of telecommunications services to control the promotional messages and block unwanted messages, by providing a free filtering service for users via SMS, This service will prevent the users from receiving spam messages. The controls also included categorizing and defining the types of all messages received (other than promotional) "service messages, warning, awareness and personal" so that they are sure to reach all users.
You can access the link below to learn about anti-spam restrictions:Spam SMS Limitations Controls