договор на трудоустройство(с правом нанимателя прервать его в одностороннем порядке; contractual relationships in which an employee can be dismissed by an employer for any reason and without warning Val_Ships)
бессрочная аренда(Black's Law Dictionary – A tenancy in which the tenant holds possession with the landlord's consent but without fixed terms (as for duration or rent); such a tenancy may be terminated by either party upon fair notice. Also termed: tenancy at will; estate at will. алешаBG)
