1. Processing shall be lawful only if and to the extent that at least one of the following applies:

(a) processing is necessary for the performance of a task carried out in the public interest or in the exercise of official authority vested in the Union institution or body;

(b) processing is necessary for compliance with a legal obligation to which the controller is subject;

(c) processing is necessary for the performance of a contract to which the data subject is party or in order to take steps at the request of the data subject prior to entering into a contract;

(d) the data subject has given consent to the processing of his or her personal data for one or more specific purposes;

(e) processing is necessary in order to protect the vital interests of the data subject or of another natural person.

2. The basis for the processing referred to in points (a) and (b) of paragraph 1 shall be laid down in Union law.