24 As to Us, we cherish the hope that the coming celebration will mark for the Third Order a new development, and We doubt not that you yourselves, Venerable Brothers, as well as the other pastors of souls, will make great efforts to cause to flourish again the groups of tertiaries where they vegetate, and to create others everywhere possible, and to render all flourishing, as much by the observation of the rule as by the number of their members.
Source: Sacra Propediem (Vatican.va)