Via Vatican Insider:

In a new move aimed at reforming the clergy and eliminating careerism in the Catholic Church, Pope Francis has abolished the conferral of the Pontifical Honor of ‘Monsignor’ on secular priests under the age of 65.

Henceforth, the only Pontifical Honor that will be conferred on ‘secular priests’  will be that of ‘Chaplain to His Holiness’ and this will be conferred only on ‘worthy priests’ who are over 65 years of age. (‘Secular priests’ are priests in a diocese, who are not monks or members of religious institutes or orders).