English to Spanish Bus/Financial Law: Contract(s) Contrato de alquiler

Hola a todos! Estov traduciendo un contrato de alquiler y no se como traducir la parte del final del todo de este párrafo:

Not to do or suffer to be done in or about the Premises any act or thing which may be or
become a nuisance or damage or annoyance to the Landlord or the occupiers or owners of any
adjoining or adjacent property and no music of any description whether by wireless or by any other
instrument or singing shall take place in the Premises so as to cause annoyance to the occupiers or
owners of any adjoining or adjacent property or so as to be audible outside the Premises between
the hours of 7.30 pm and 7.30 am and for the purpose of this Clause the unlawful possession or
taking of drugs by the Tenant or any other person upon the said Premises shall be deemed a
nuisance and shall immediately operate to determine this Agreement.

Qué quiere decir "and shall immediately operate to determine this agreeement" y cómo traducirlo? Muchas gracias!