21. Limitations on protection

Sections 17, 18, 19 and 20 shall not apply where the acts referred to in those sections are related to—

the use by a physical person exclusively for his own personal purposes ;

using short excerpts for reporting current events to the extent justified by the purpose of providing current information ;

use solely for the purpose of face to face teaching activities or for scientific research ;

cases where, under copyright, a work can be used without the authorization of the owner of copyright.