1. Providers of number-based interpersonal communications services shall deploy state of the art measures to limit the reception of unwanted, malicious or nuisance calls by end-users.
2. Providers of number-based interpersonal communications services shall also provide the called end-user with the following possibilities, free of charge:
(a) to block incoming calls from specific numbers or from anonymous sources or from numbers using a specific code or prefix referred to in Article 16(3a); and
(b) to stop automatic call forwarding by a third party to the end-user’s terminal equipment