More colloquially, this is about the care and feeding of deacons. A deacon isn’t a free agent; he must be connected to a faith community, not of his own making:
18. Any deacon who is not a professed member of a religious family must be duly enrolled in a diocese.
Most deacons have work in the world, but this statement speaking of sustenance should be interpreted along the lines of spiritual sustenance. #20 says keep the man’s family in mind, too:
19. The norms in force with regard to caring for the fitting sustenance of priests and guaranteeing their social security are to be observed also in favor of the permanent deacons taking into consideration also the family of married deacons and keeping article 21 of this letter in mind.
20. It is the function of the Episcopal Conference to issue definite norms on the proper sustenance of the deacon and his family if he is married in keeping with the various circumstances of place and time.
Thoughts, comments, questions, concerns, especially from any deacons in the readership?