Article 6 of Regulation (EC) 1107/2006 provides that:

1. Air carriers, their agents and tour operators shall take all measures necessary for the receipt, at all their points of sale in the territory of the Member States to which the Treaty applies, including sale by telephone and via the Internet, of notifications of the need for assistance made by disabled persons or persons with reduced mobility.

2. When an air carrier or its agent or a tour operator receives a notification of the need for assistance at least 48 hours before the published departure time for the flight, it shall transmit the information concerned at least 36 hours before the published departure time for the flight:

a) to the managing bodies of the airports of departure, arrival and transit, and
b) to the operating air carrier, if a reservation was not made with that carrier, unless the identity of the operating air carrier is not known at the time of notification, in which case the information shall be transmitted as soon as practicable.

3. In all cases other than those mentioned in paragraph 2, the air carrier or its agent or tour operator shall transmit the information as soon as possible.

4. As soon as possible after the departure of the flight, an operating air carrier shall inform the managing body of the airport of destination, if situated in the territory of a Member State to which the Treaty applies, of the number of disabled persons and persons with reduced mobility on that flight requiring assistance specified in Annex 1 and of the nature of that assistance.
 

Paragraph 1.2.2.2, letter a), of the public part of the National Civil Aviation Security Programme (Programa Nacional de Seguridad: PNS) provides that:

1.2.2.2 Authorised access to restricted areas will be limited to:

a) Passengers with a boarding card or equivalent document, accepted for travel with an air carrier. Minors under 14 travelling alone may access the boarding lounge accompanied by an adult carrying an escort card issued by the airline, in a format that has been validated by the Local Security Committee beforehand. An authorised escort may also be allowed to access the boarding lounge or the baggage reclaim area to collect a minor from an arriving flight under the same conditions as in the case above.

This access procedure is applicable to the escort, who is not going to fly, of a deaf-blind passenger who needs their help, even it they request the assistance service for people with reduced mobility.