The AEPD links this GDPR regime with article 21 of the LSSI

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Know and apply the laws that affect all marketing campaigns.
Starting by understanding how to develop a legally valid commercial strategy is to ensure clean, uncontaminated marketing that guarantees seamless compliance with all the rules that regulate legal marketing and is committed to the rights of the recipients of your campaigns and to current legislation.

The marketing laws you should apply to your subscriber list
There are 3 key regulations that establish the legal rules in every marketing strategy and whose principles mark the red lines between a legal strategy and a Chernobyl strategy:

Law 34/2002, of July 11, on Information Society Services and Electronic Commerce (LSSICE or LSSI).
This law regulates economic transactions through electronic means.

Almost all recruitment campaigns are carried out electronically, so you must also comply with Law 34/2002 on information society services and electronic commerce , the LSSI-CE.

which requires that these communications have been venezuela phone number list requested or expressly authorized by the recipients thereof, or that there is a prior contractual relationship, provided that the provider has lawfully obtained the recipient's contact information and used it to send commercial communications regarding products or services of its own company that are similar to those that were initially contracted with the client.

Regulation (EU) 2016/679 of the European Parliament and of the Council of 27 April 2016 on the protection of natural persons.
This Regulation is based on the processing of personal data and the free movement of such data and repeals Directive 95/46/EC (General Data Protection Regulation).