The essay, taking the cue from a recent Court of Cassation decision, focuses on the legitimacy of the collective clauses that constrain the employer's negotiating autonomy in the use of job-on-call where permitted by act of law or ministerial decrees. More generally, the A. investi-gates the necessary conditions so that the law can legitimately prevent collective autonomy from intervening on the balance of individual interests as set by the law itself.
Keywords: Relationships between law and collective bargaining; Freedom to hire; Freedom of collective bargaining.